139801824 has 36 divisors (see below), whose sum is σ = 397562256. Its totient is φ = 46600512.

The previous prime is 139801817. The next prime is 139801853. The reversal of 139801824 is 428108931.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 242424 + ... + 242999.

It is an arithmetic number, because the mean of its divisors is an integer number (11043396).

Almost surely, 2^139801824 is an apocalyptic number.

It is an amenable number.

139801824 is an abundant number, since it is smaller than the sum of its proper divisors (257760432).

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

139801824 is a wasteful number, since it uses less digits than its factorization.

139801824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485439 (or 485428 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 139801824 is about 11823.7821360172. The cubic root of 139801824 is about 519.0042878904.

It can be divided in two parts, 139801 and 824, that added together give a square (140625 = 375²).

The spelling of 139801824 in words is "one hundred thirty-nine million, eight hundred one thousand, eight hundred twenty-four".