139400452 has 12 divisors (see below), whose sum is σ = 244060236. Its totient is φ = 69668960.

The previous prime is 139400431. The next prime is 139400461. The reversal of 139400452 is 254004931.

It can be written as a sum of positive squares in 2 ways, for example, as 82156096 + 57244356 = 9064^2 + 7566^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139400452.

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, 4302 + ... + 17242.

It is an arithmetic number, because the mean of its divisors is an integer number (20338353).

Almost surely, 2^139400452 is an apocalyptic number.

It is an amenable number.

139400452 is a deficient number, since it is larger than the sum of its proper divisors (104659784).

139400452 is a wasteful number, since it uses less digits than its factorization.

139400452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15638 (or 15636 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 139400452 is about 11806.7968560486. The cubic root of 139400452 is about 518.5071235034.

The spelling of 139400452 in words is "one hundred thirty-nine million, four hundred thousand, four hundred fifty-two".