22457420 has 24 divisors (see below), whose sum is σ = 47249664. Its totient is φ = 8966016.

The previous prime is 22457419. The next prime is 22457443. The reversal of 22457420 is 2475422.

It is a self number, because there is not a number n which added to its sum of digits gives 22457420.

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, 20117 + ... + 21203.

It is an arithmetic number, because the mean of its divisors is an integer number (1968736).

Almost surely, 2^22457420 is an apocalyptic number.

22457420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22457420 is an abundant number, since it is smaller than the sum of its proper divisors (24792244).

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

22457420 is a wasteful number, since it uses less digits than its factorization.

22457420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 22457420 is about 4738.9260386716. The cubic root of 22457420 is about 282.1326103664.

The spelling of 22457420 in words is "twenty-two million, four hundred fifty-seven thousand, four hundred twenty".