139157490 has 16 divisors (see below), whose sum is σ = 333978048. Its totient is φ = 37108656.

The previous prime is 139157483. The next prime is 139157509. The reversal of 139157490 is 94751931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2319262 + ... + 2319321.

It is an arithmetic number, because the mean of its divisors is an integer number (20873628).

Almost surely, 2^139157490 is an apocalyptic number.

139157490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139157490 is an abundant number, since it is smaller than the sum of its proper divisors (194820558).

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

139157490 is a wasteful number, since it uses less digits than its factorization.

139157490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638593.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 139157490 is about 11796.5032954685. The cubic root of 139157490 is about 518.2057117889.

The spelling of 139157490 in words is "one hundred thirty-nine million, one hundred fifty-seven thousand, four hundred ninety".