8357920 has 24 divisors (see below), whose sum is σ = 19745964. Its totient is φ = 3343104.

The previous prime is 8357917. The next prime is 8357927. The reversal of 8357920 is 297538.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 132496 = 2868^2 + 364^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8357927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25959 + ... + 26278.

Almost surely, 2^8357920 is an apocalyptic number.

8357920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8357920 is an abundant number, since it is smaller than the sum of its proper divisors (11388044).

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

8357920 is a wasteful number, since it uses less digits than its factorization.

8357920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52252 (or 52244 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 8357920 is about 2891.0067450630. The cubic root of 8357920 is about 202.9392588458.

The spelling of 8357920 in words is "eight million, three hundred fifty-seven thousand, nine hundred twenty".