22858640 has 40 divisors (see below), whose sum is σ = 60740160. Its totient is φ = 7837056.

The previous prime is 22858639. The next prime is 22858643. The reversal of 22858640 is 4685822.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 22858640.

It is not an unprimeable number, because it can be changed into a prime (22858643) 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, 19850 + ... + 20969.

It is an arithmetic number, because the mean of its divisors is an integer number (1518504).

Almost surely, 2^22858640 is an apocalyptic number.

22858640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22858640 is an abundant number, since it is smaller than the sum of its proper divisors (37881520).

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

22858640 is a wasteful number, since it uses less digits than its factorization.

22858640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40839 (or 40833 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 22858640 is about 4781.0710097216. The cubic root of 22858640 is about 283.8028784864.

The spelling of 22858640 in words is "twenty-two million, eight hundred fifty-eight thousand, six hundred forty".