39978152 has 16 divisors (see below), whose sum is σ = 79368660. Its totient is φ = 18813184.

The previous prime is 39978143. The next prime is 39978173. The reversal of 39978152 is 25187993.

It can be written as a sum of positive squares in 2 ways, for example, as 39866596 + 111556 = 6314^2 + 334^2 .

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, 146843 + ... + 147114.

Almost surely, 2^39978152 is an apocalyptic number.

It is an amenable number.

39978152 is a deficient number, since it is larger than the sum of its proper divisors (39390508).

39978152 is a wasteful number, since it uses less digits than its factorization.

39978152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293980 (or 293976 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 39978152 is about 6322.8278483603. The cubic root of 39978152 is about 341.9329120712.

The spelling of 39978152 in words is "thirty-nine million, nine hundred seventy-eight thousand, one hundred fifty-two".