28402632 has 24 divisors (see below), whose sum is σ = 76923990. Its totient is φ = 9467520.

The previous prime is 28402613. The next prime is 28402651. The reversal of 28402632 is 23620482.

28402632 is a `hidden beast` number, since 28 + 4 + 0 + 2 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (28402613) and next prime (28402651).

It can be written as a sum of positive squares in only one way, i.e., 24265476 + 4137156 = 4926^2 + 2034^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×28402632³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28402596 and 28402605.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197169 + ... + 197312.

Almost surely, 2^28402632 is an apocalyptic number.

It is an amenable number.

28402632 is an abundant number, since it is smaller than the sum of its proper divisors (48521358).

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

28402632 is a wasteful number, since it uses less digits than its factorization.

28402632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394493 (or 394486 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28402632 is about 5329.4119750682. The cubic root of 28402632 is about 305.1074851839.

The spelling of 28402632 in words is "twenty-eight million, four hundred two thousand, six hundred thirty-two".