38257220 has 24 divisors (see below), whose sum is σ = 80811864. Its totient is φ = 15213056.

The previous prime is 38257217. The next prime is 38257231. The reversal of 38257220 is 2275283.

It can be written as a sum of positive squares in 4 ways, for example, as 5607424 + 32649796 = 2368^2 + 5714^2 .

It is a super-2 number, since 2×38257220² = 2927229764256800, 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, 2069 + ... + 8988.

It is an arithmetic number, because the mean of its divisors is an integer number (3367161).

Almost surely, 2^38257220 is an apocalyptic number.

It is an amenable number.

38257220 is an abundant number, since it is smaller than the sum of its proper divisors (42554644).

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

38257220 is a wasteful number, since it uses less digits than its factorization.

38257220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11239 (or 11237 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 38257220 is about 6185.2421132887. The cubic root of 38257220 is about 336.9544033383.

The spelling of 38257220 in words is "thirty-eight million, two hundred fifty-seven thousand, two hundred twenty".