139925790 has 72 divisors (see below), whose sum is σ = 380441880. Its totient is φ = 35679072.

The previous prime is 139925789. The next prime is 139925791. The reversal of 139925790 is 97529931.

It is a happy number.

139925790 is a `hidden beast` number, since 1 + 399 + 257 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (139925789) and next prime (139925791).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139925791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46141 + ... + 49079.

It is an arithmetic number, because the mean of its divisors is an integer number (5283915).

Almost surely, 2^139925790 is an apocalyptic number.

139925790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139925790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190220940).

139925790 is an abundant number, since it is smaller than the sum of its proper divisors (240516090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139925790 is a wasteful number, since it uses less digits than its factorization.

139925790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998 (or 2972 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 139925790 is about 11829.0232056582. The cubic root of 139925790 is about 519.1576475441.

It can be divided in two parts, 139925 and 790, that added together give a triangular number (140715 = T₅₃₀).

The spelling of 139925790 in words is "one hundred thirty-nine million, nine hundred twenty-five thousand, seven hundred ninety".