139756940 has 12 divisors (see below), whose sum is σ = 293489616. Its totient is φ = 55902768.

The previous prime is 139756927. The next prime is 139756961. The reversal of 139756940 is 49657931.

It is a junction number, because it is equal to n+sod(n) for n = 139756891 and 139756900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3493904 + ... + 3493943.

It is an arithmetic number, because the mean of its divisors is an integer number (24457468).

Almost surely, 2^139756940 is an apocalyptic number.

139756940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139756940 is an abundant number, since it is smaller than the sum of its proper divisors (153732676).

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

139756940 is a wasteful number, since it uses less digits than its factorization.

139756940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6987856 (or 6987854 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 139756940 is about 11821.8839446173. The cubic root of 139756940 is about 518.9487390637.

Subtracting from 139756940 its reverse (49657931), we obtain a palindrome (90099009).

The spelling of 139756940 in words is "one hundred thirty-nine million, seven hundred fifty-six thousand, nine hundred forty".