38561978 has 16 divisors (see below), whose sum is σ = 71191680. Its totient is φ = 15255216.

The previous prime is 38561947. The next prime is 38561981. The reversal of 38561978 is 87916583.

It is a happy number.

It is a super-2 number, since 2×38561978² = 2974052294544968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105758 + ... + 106121.

It is an arithmetic number, because the mean of its divisors is an integer number (4449480).

Almost surely, 2^38561978 is an apocalyptic number.

38561978 is a deficient number, since it is larger than the sum of its proper divisors (32629702).

38561978 is a wasteful number, since it uses less digits than its factorization.

38561978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211901.

The product of its digits is 362880, while the sum is 47.

The square root of 38561978 is about 6209.8291441875. The cubic root of 38561978 is about 337.8467671375.

The spelling of 38561978 in words is "thirty-eight million, five hundred sixty-one thousand, nine hundred seventy-eight".