28742808 has 16 divisors (see below), whose sum is σ = 71857080. Its totient is φ = 9580928.

The previous prime is 28742783. The next prime is 28742827. The reversal of 28742808 is 80824782.

It is a super-2 number, since 2×28742808² = 1652298023449728, 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, 598785 + ... + 598832.

Almost surely, 2^28742808 is an apocalyptic number.

It is an amenable number.

28742808 is an abundant number, since it is smaller than the sum of its proper divisors (43114272).

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

28742808 is a wasteful number, since it uses less digits than its factorization.

28742808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197626 (or 1197622 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 28742808 is about 5361.2319479761. The cubic root of 28742808 is about 306.3207367908.

The spelling of 28742808 in words is "twenty-eight million, seven hundred forty-two thousand, eight hundred eight".