22405620 has 48 divisors (see below), whose sum is σ = 62955648. Its totient is φ = 5953920.

The previous prime is 22405613. The next prime is 22405631. The reversal of 22405620 is 2650422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24817 + ... + 25703.

It is an arithmetic number, because the mean of its divisors is an integer number (1311576).

Almost surely, 2^22405620 is an apocalyptic number.

22405620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22405620 is an abundant number, since it is smaller than the sum of its proper divisors (40550028).

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

22405620 is a wasteful number, since it uses less digits than its factorization.

22405620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 22405620 is about 4733.4575101082. The cubic root of 22405620 is about 281.9155222035.

The spelling of 22405620 in words is "twenty-two million, four hundred five thousand, six hundred twenty".