139420770 has 32 divisors (see below), whose sum is σ = 334922688. Its totient is φ = 37144128.

The previous prime is 139420763. The next prime is 139420789. The reversal of 139420770 is 77024931.

It is a super-2 number, since 2×139420770² = 38876302214785800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55992 + ... + 58428.

It is an arithmetic number, because the mean of its divisors is an integer number (10466334).

Almost surely, 2^139420770 is an apocalyptic number.

139420770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139420770 is an abundant number, since it is smaller than the sum of its proper divisors (195501918).

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

139420770 is a wasteful number, since it uses less digits than its factorization.

139420770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 139420770 is about 11807.6572612860. The cubic root of 139420770 is about 518.5323135603.

The spelling of 139420770 in words is "one hundred thirty-nine million, four hundred twenty thousand, seven hundred seventy".