28742684 has 12 divisors (see below), whose sum is σ = 50337504. Its totient is φ = 14360544.

The previous prime is 28742677. The next prime is 28742711. The reversal of 28742684 is 48624782.

It is a super-2 number, since 2×28742684² = 1652283767047712, 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 3 ways as a sum of consecutive naturals, for example, 7997 + ... + 11019.

It is an arithmetic number, because the mean of its divisors is an integer number (4194792).

Almost surely, 2^28742684 is an apocalyptic number.

It is an amenable number.

28742684 is a deficient number, since it is larger than the sum of its proper divisors (21594820).

28742684 is a wasteful number, since it uses less digits than its factorization.

28742684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404 (or 5402 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 28742684 is about 5361.2203834575. The cubic root of 28742684 is about 306.3202962884.

The spelling of 28742684 in words is "twenty-eight million, seven hundred forty-two thousand, six hundred eighty-four".