21829488 has 40 divisors (see below), whose sum is σ = 56627328. Its totient is φ = 7246272.

The previous prime is 21829477. The next prime is 21829501. The reversal of 21829488 is 88492812.

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, 12781 + ... + 14387.

Almost surely, 2^21829488 is an apocalyptic number.

It is an amenable number.

21829488 is an abundant number, since it is smaller than the sum of its proper divisors (34797840).

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

21829488 is a wasteful number, since it uses less digits than its factorization.

21829488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901 (or 1895 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 21829488 is about 4672.2037626799. The cubic root of 21829488 is about 279.4781436288.

The spelling of 21829488 in words is "twenty-one million, eight hundred twenty-nine thousand, four hundred eighty-eight".