28274532 has 48 divisors (see below), whose sum is σ = 77512512. Its totient is φ = 7908480.

The previous prime is 28274509. The next prime is 28274551. The reversal of 28274532 is 23547282.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28274493 and 28274502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6523 + ... + 9954.

It is an arithmetic number, because the mean of its divisors is an integer number (1614844).

Almost surely, 2^28274532 is an apocalyptic number.

28274532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28274532 is an abundant number, since it is smaller than the sum of its proper divisors (49237980).

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

28274532 is a wasteful number, since it uses less digits than its factorization.

28274532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16508 (or 16506 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 28274532 is about 5317.3801820069. The cubic root of 28274532 is about 304.6481008200.

The spelling of 28274532 in words is "twenty-eight million, two hundred seventy-four thousand, five hundred thirty-two".