22399620 has 24 divisors (see below), whose sum is σ = 62719104. Its totient is φ = 5973216.

The previous prime is 22399607. The next prime is 22399667. The reversal of 22399620 is 2699322.

It is a happy number.

It is a super-2 number, since 2×22399620² = 1003485952288800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186604 + ... + 186723.

It is an arithmetic number, because the mean of its divisors is an integer number (2613296).

Almost surely, 2^22399620 is an apocalyptic number.

22399620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22399620 is an abundant number, since it is smaller than the sum of its proper divisors (40319484).

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

22399620 is a wasteful number, since it uses less digits than its factorization.

22399620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373339 (or 373337 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 22399620 is about 4732.8236814823. The cubic root of 22399620 is about 281.8903552417.

The spelling of 22399620 in words is "twenty-two million, three hundred ninety-nine thousand, six hundred twenty".