139857448 has 16 divisors (see below), whose sum is σ = 265180500. Its totient is φ = 69142656.

The previous prime is 139857391. The next prime is 139857449. The reversal of 139857448 is 844758931.

It can be written as a sum of positive squares in 2 ways, for example, as 132664324 + 7193124 = 11518^2 + 2682^2 .

It is a super-2 number, since 2×139857448² = 39120211522145408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139857449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97503 + ... + 98926.

Almost surely, 2^139857448 is an apocalyptic number.

It is an amenable number.

139857448 is a deficient number, since it is larger than the sum of its proper divisors (125323052).

139857448 is a wasteful number, since it uses less digits than its factorization.

139857448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196524 (or 196520 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 139857448 is about 11826.1341105198. The cubic root of 139857448 is about 519.0731121393.

The spelling of 139857448 in words is "one hundred thirty-nine million, eight hundred fifty-seven thousand, four hundred forty-eight".