22291680 has 48 divisors (see below), whose sum is σ = 70220304. Its totient is φ = 5944320.

The previous prime is 22291679. The next prime is 22291729. The reversal of 22291680 is 8619222.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

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, 22741 + ... + 23700.

It is an arithmetic number, because the mean of its divisors is an integer number (1462923).

Almost surely, 2^22291680 is an apocalyptic number.

22291680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22291680 is an abundant number, since it is smaller than the sum of its proper divisors (47928624).

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

22291680 is a wasteful number, since it uses less digits than its factorization.

22291680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46459 (or 46451 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 22291680 is about 4721.4065700806. The cubic root of 22291680 is about 281.4368319111.

The spelling of 22291680 in words is "twenty-two million, two hundred ninety-one thousand, six hundred eighty".