28004382 has 36 divisors (see below), whose sum is σ = 70584696. Its totient is φ = 8001000.

The previous prime is 28004369. The next prime is 28004393. The reversal of 28004382 is 28340082.

28004382 is a `hidden beast` number, since 280 + 0 + 4 + 382 = 666.

It is a super-2 number, since 2×28004382² = 1568490822403848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14994 + ... + 16757.

It is an arithmetic number, because the mean of its divisors is an integer number (1960686).

Almost surely, 2^28004382 is an apocalyptic number.

28004382 is an abundant number, since it is smaller than the sum of its proper divisors (42580314).

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

28004382 is a wasteful number, since it uses less digits than its factorization.

28004382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31773 (or 31763 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28004382 is about 5291.9166660105. The cubic root of 28004382 is about 303.6747372337.

The spelling of 28004382 in words is "twenty-eight million, four thousand, three hundred eighty-two".