38931930 has 24 divisors (see below), whose sum is σ = 101223252. Its totient is φ = 10381824.

The previous prime is 38931929. The next prime is 38931941. The reversal of 38931930 is 3913983.

It can be written as a sum of positive squares in 2 ways, for example, as 34609689 + 4322241 = 5883^2 + 2079^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216199 + ... + 216378.

Almost surely, 2^38931930 is an apocalyptic number.

38931930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38931930 is an abundant number, since it is smaller than the sum of its proper divisors (62291322).

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

38931930 is a wasteful number, since it uses less digits than its factorization.

38931930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432590 (or 432587 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 38931930 is about 6239.5456565362. The cubic root of 38931930 is about 338.9237304598.

The spelling of 38931930 in words is "thirty-eight million, nine hundred thirty-one thousand, nine hundred thirty".