38220931 has 12 divisors (see below), whose sum is σ = 44898672. Its totient is φ = 32438448.

The previous prime is 38220929. The next prime is 38220977. The reversal of 38220931 is 13902283.

It is not a de Polignac number, because 38220931 - 2¹ = 38220929 is a prime.

It is a super-2 number, since 2×38220931² = 2921679133013522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38220931.

It is not an unprimeable number, because it can be changed into a prime (38220991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261 + ... + 8833.

It is an arithmetic number, because the mean of its divisors is an integer number (3741556).

Almost surely, 2^38220931 is an apocalyptic number.

38220931 is a deficient number, since it is larger than the sum of its proper divisors (6677741).

38220931 is a wasteful number, since it uses less digits than its factorization.

38220931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7690 (or 7683 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 38220931 is about 6182.3079023937. The cubic root of 38220931 is about 336.8478299333.

The spelling of 38220931 in words is "thirty-eight million, two hundred twenty thousand, nine hundred thirty-one".