22722690 has 64 divisors (see below), whose sum is σ = 57480192. Its totient is φ = 5740800.

The previous prime is 22722673. The next prime is 22722701. The reversal of 22722690 is 9622722.

It is a super-2 number, since 2×22722690² = 1032641281672200, which contains 22 as substring.

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

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 31 ways as a sum of consecutive naturals, for example, 49060 + ... + 49520.

It is an arithmetic number, because the mean of its divisors is an integer number (898128).

Almost surely, 2^22722690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22722690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28740096).

22722690 is an abundant number, since it is smaller than the sum of its proper divisors (34757502).

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

22722690 is a wasteful number, since it uses less digits than its factorization.

22722690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 22722690 is about 4766.8322815052. The cubic root of 22722690 is about 283.2391274659.

The spelling of 22722690 in words is "twenty-two million, seven hundred twenty-two thousand, six hundred ninety".