22857420 has 24 divisors (see below), whose sum is σ = 64000944. Its totient is φ = 6095296.

The previous prime is 22857407. The next prime is 22857421. The reversal of 22857420 is 2475822.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (22857421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190419 + ... + 190538.

It is an arithmetic number, because the mean of its divisors is an integer number (2666706).

Almost surely, 2^22857420 is an apocalyptic number.

22857420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22857420 is an abundant number, since it is smaller than the sum of its proper divisors (41143524).

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

22857420 is a wasteful number, since it uses less digits than its factorization.

22857420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380969 (or 380967 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 22857420 is about 4780.9434215435. The cubic root of 22857420 is about 283.7978294010.

The spelling of 22857420 in words is "twenty-two million, eight hundred fifty-seven thousand, four hundred twenty".