28689932 has 24 divisors (see below), whose sum is σ = 52284960. Its totient is φ = 13758080.

The previous prime is 28689889. The next prime is 28689953. The reversal of 28689932 is 23998682.

It is a super-2 number, since 2×28689932² = 1646224396329248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18632 + ... + 20112.

It is an arithmetic number, because the mean of its divisors is an integer number (2178540).

Almost surely, 2^28689932 is an apocalyptic number.

It is an amenable number.

28689932 is a deficient number, since it is larger than the sum of its proper divisors (23595028).

28689932 is a wasteful number, since it uses less digits than its factorization.

28689932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1679 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 28689932 is about 5356.2983486733. The cubic root of 28689932 is about 306.1327830183.

The spelling of 28689932 in words is "twenty-eight million, six hundred eighty-nine thousand, nine hundred thirty-two".