22857320 has 16 divisors (see below), whose sum is σ = 51429060. Its totient is φ = 9142912.

The previous prime is 22857313. The next prime is 22857337. The reversal of 22857320 is 2375822.

It can be written as a sum of positive squares in 2 ways, for example, as 21771556 + 1085764 = 4666^2 + 1042^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285677 + ... + 285756.

Almost surely, 2^22857320 is an apocalyptic number.

22857320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22857320 is an abundant number, since it is smaller than the sum of its proper divisors (28571740).

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

22857320 is a wasteful number, since it uses less digits than its factorization.

22857320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571444 (or 571440 counting only the distinct ones).

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

The square root of 22857320 is about 4780.9329633451. The cubic root of 22857320 is about 283.7974155336.

The spelling of 22857320 in words is "twenty-two million, eight hundred fifty-seven thousand, three hundred twenty".