139297770 has 48 divisors (see below), whose sum is σ = 368125992. Its totient is φ = 36535680.

The previous prime is 139297751. The next prime is 139297771. The reversal of 139297770 is 77792931.

It can be written as a sum of positive squares in 4 ways, for example, as 27594009 + 111703761 = 5253^2 + 10569^2 .

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

It is not an unprimeable number, because it can be changed into a prime (139297771) 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 23 ways as a sum of consecutive naturals, for example, 7197 + ... + 18176.

Almost surely, 2^139297770 is an apocalyptic number.

139297770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139297770 is an abundant number, since it is smaller than the sum of its proper divisors (228828222).

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

139297770 is a wasteful number, since it uses less digits than its factorization.

139297770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25447 (or 25444 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 139297770 is about 11802.4476275051. The cubic root of 139297770 is about 518.3797819118.

The spelling of 139297770 in words is "one hundred thirty-nine million, two hundred ninety-seven thousand, seven hundred seventy".