28697604 has 24 divisors (see below), whose sum is σ = 72112320. Its totient is φ = 8829984.

The previous prime is 28697597. The next prime is 28697609. The reversal of 28697604 is 40679682.

It is not an unprimeable number, because it can be changed into a prime (28697609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91824 + ... + 92135.

It is an arithmetic number, because the mean of its divisors is an integer number (3004680).

Almost surely, 2^28697604 is an apocalyptic number.

It is an amenable number.

28697604 is an abundant number, since it is smaller than the sum of its proper divisors (43414716).

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

28697604 is a wasteful number, since it uses less digits than its factorization.

28697604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183979 (or 183977 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 28697604 is about 5357.0144670329. The cubic root of 28697604 is about 306.1600683321.

The spelling of 28697604 in words is "twenty-eight million, six hundred ninety-seven thousand, six hundred four".