38949920 has 24 divisors (see below), whose sum is σ = 92019564. Its totient is φ = 15579904.

The previous prime is 38949917. The next prime is 38949947. The reversal of 38949920 is 2994983.

38949920 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 38390416 + 559504 = 6196^2 + 748^2 .

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, 121559 + ... + 121878.

Almost surely, 2^38949920 is an apocalyptic number.

It is an amenable number.

38949920 is an abundant number, since it is smaller than the sum of its proper divisors (53069644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38949920 is a wasteful number, since it uses less digits than its factorization.

38949920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243452 (or 243444 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 38949920 is about 6240.9871014127. The cubic root of 38949920 is about 338.9759266819.

The spelling of 38949920 in words is "thirty-eight million, nine hundred forty-nine thousand, nine hundred twenty".