28090508 has 6 divisors (see below), whose sum is σ = 49158396. Its totient is φ = 14045252.

The previous prime is 28090507. The next prime is 28090541. The reversal of 28090508 is 80509082.

It is not an unprimeable number, because it can be changed into a prime (28090501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3511310 + ... + 3511317.

It is an arithmetic number, because the mean of its divisors is an integer number (8193066).

Almost surely, 2^28090508 is an apocalyptic number.

It is an amenable number.

28090508 is a deficient number, since it is larger than the sum of its proper divisors (21067888).

28090508 is a wasteful number, since it uses less digits than its factorization.

28090508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022631 (or 7022629 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 28090508 is about 5300.0479243116. The cubic root of 28090508 is about 303.9857305167.

The spelling of 28090508 in words is "twenty-eight million, ninety thousand, five hundred eight".