22420640 has 48 divisors (see below), whose sum is σ = 57788640. Its totient is φ = 8152320.

The previous prime is 22420633. The next prime is 22420667. The reversal of 22420640 is 4602422.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4610 + ... + 8129.

It is an arithmetic number, because the mean of its divisors is an integer number (1203930).

Almost surely, 2^22420640 is an apocalyptic number.

22420640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22420640 is an abundant number, since it is smaller than the sum of its proper divisors (35368000).

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

22420640 is a wasteful number, since it uses less digits than its factorization.

22420640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12765 (or 12757 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22420640 is about 4735.0438223949. The cubic root of 22420640 is about 281.9785038021.

The spelling of 22420640 in words is "twenty-two million, four hundred twenty thousand, six hundred forty".