21895488 has 56 divisors (see below), whose sum is σ = 64373760. Its totient is φ = 7297920.

The previous prime is 21895481. The next prime is 21895499. The reversal of 21895488 is 88459812.

It is a happy number.

21895488 is a `hidden beast` number, since 21 + 89 + 548 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21895481) 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, 4608 + ... + 8063.

Almost surely, 2^21895488 is an apocalyptic number.

It is an amenable number.

21895488 is an abundant number, since it is smaller than the sum of its proper divisors (42478272).

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

21895488 is a wasteful number, since it uses less digits than its factorization.

21895488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12692 (or 12676 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 21895488 is about 4679.2614801911. The cubic root of 21895488 is about 279.7595214147.

The spelling of 21895488 in words is "twenty-one million, eight hundred ninety-five thousand, four hundred eighty-eight".