139290128 has 20 divisors (see below), whose sum is σ = 272266428. Its totient is φ = 69027840.

The previous prime is 139290097. The next prime is 139290131. The reversal of 139290128 is 821092931.

It can be written as a sum of positive squares in 2 ways, for example, as 48888064 + 90402064 = 6992^2 + 9508^2 .

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, 36713 + ... + 40328.

Almost surely, 2^139290128 is an apocalyptic number.

It is an amenable number.

139290128 is a deficient number, since it is larger than the sum of its proper divisors (132976300).

139290128 is a wasteful number, since it uses less digits than its factorization.

139290128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77162 (or 77156 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 139290128 is about 11802.1238766588. The cubic root of 139290128 is about 518.3703021459.

The spelling of 139290128 in words is "one hundred thirty-nine million, two hundred ninety thousand, one hundred twenty-eight".