38297220 has 96 divisors (see below), whose sum is σ = 118691328. Its totient is φ = 9165312.

The previous prime is 38297201. The next prime is 38297297. The reversal of 38297220 is 2279283.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28197 + ... + 29523.

It is an arithmetic number, because the mean of its divisors is an integer number (1236368).

Almost surely, 2^38297220 is an apocalyptic number.

38297220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38297220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59345664).

38297220 is an abundant number, since it is smaller than the sum of its proper divisors (80394108).

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

38297220 is a wasteful number, since it uses less digits than its factorization.

38297220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 38297220 is about 6188.4747717026. The cubic root of 38297220 is about 337.0717971398.

The spelling of 38297220 in words is "thirty-eight million, two hundred ninety-seven thousand, two hundred twenty".