22557390 has 16 divisors (see below), whose sum is σ = 54137808. Its totient is φ = 6015296.

The previous prime is 22557371. The next prime is 22557391. The reversal of 22557390 is 9375522.

It is a super-2 number, since 2×22557390² = 1017671687224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22557391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375927 + ... + 375986.

It is an arithmetic number, because the mean of its divisors is an integer number (3383613).

Almost surely, 2^22557390 is an apocalyptic number.

22557390 is an abundant number, since it is smaller than the sum of its proper divisors (31580418).

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

22557390 is a wasteful number, since it uses less digits than its factorization.

22557390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751923.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 22557390 is about 4749.4620748038. The cubic root of 22557390 is about 282.5506317999.

The spelling of 22557390 in words is "twenty-two million, five hundred fifty-seven thousand, three hundred ninety".