21282488 has 8 divisors (see below), whose sum is σ = 39904680. Its totient is φ = 10641240.

The previous prime is 21282467. The next prime is 21282497. The reversal of 21282488 is 88428212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330148 + ... + 1330163.

It is an arithmetic number, because the mean of its divisors is an integer number (4988085).

Almost surely, 2^21282488 is an apocalyptic number.

It is an amenable number.

21282488 is a deficient number, since it is larger than the sum of its proper divisors (18622192).

21282488 is a wasteful number, since it uses less digits than its factorization.

21282488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660317 (or 2660313 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 21282488 is about 4613.2947011870. The cubic root of 21282488 is about 277.1239958013.

The spelling of 21282488 in words is "twenty-one million, two hundred eighty-two thousand, four hundred eighty-eight".