139840492 has 12 divisors (see below), whose sum is σ = 266968296. Its totient is φ = 63563840.

The previous prime is 139840489. The next prime is 139840541. The reversal of 139840492 is 294048931.

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, 1589053 + ... + 1589140.

It is an arithmetic number, because the mean of its divisors is an integer number (22247358).

Almost surely, 2^139840492 is an apocalyptic number.

It is an amenable number.

139840492 is a deficient number, since it is larger than the sum of its proper divisors (127127804).

139840492 is a wasteful number, since it uses less digits than its factorization.

139840492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178208 (or 3178206 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 139840492 is about 11825.4172019426. The cubic root of 139840492 is about 519.0521342089.

The spelling of 139840492 in words is "one hundred thirty-nine million, eight hundred forty thousand, four hundred ninety-two".