22621040 has 40 divisors (see below), whose sum is σ = 56642208. Its totient is φ = 8352000.

The previous prime is 22621037. The next prime is 22621051. The reversal of 22621040 is 4012622.

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

It is a super-2 number, since 2×22621040² = 1023422901363200, which contains 22 as substring.

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, 9836 + ... + 11915.

Almost surely, 2^22621040 is an apocalyptic number.

22621040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22621040 is an abundant number, since it is smaller than the sum of its proper divisors (34021168).

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

22621040 is a wasteful number, since it uses less digits than its factorization.

22621040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21777 (or 21771 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22621040 is about 4756.1581134357. The cubic root of 22621040 is about 282.8161391532.

Adding to 22621040 its reverse (4012622), we get a palindrome (26633662).

The spelling of 22621040 in words is "twenty-two million, six hundred twenty-one thousand, forty".