21876028 has 12 divisors (see below), whose sum is σ = 39317992. Its totient is φ = 10642320.

The previous prime is 21876017. The next prime is 21876037. The reversal of 21876028 is 82067812.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21875984 and 21876002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73758 + ... + 74053.

Almost surely, 2^21876028 is an apocalyptic number.

It is an amenable number.

21876028 is a deficient number, since it is larger than the sum of its proper divisors (17441964).

21876028 is a wasteful number, since it uses less digits than its factorization.

21876028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147852 (or 147850 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 21876028 is about 4677.1816299990. The cubic root of 21876028 is about 279.6766164507.

The spelling of 21876028 in words is "twenty-one million, eight hundred seventy-six thousand, twenty-eight".