28699550 has 24 divisors (see below), whose sum is σ = 58235112. Its totient is φ = 10436000.

The previous prime is 28699543. The next prime is 28699571. The reversal of 28699550 is 5599682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25541 + ... + 26640.

It is an arithmetic number, because the mean of its divisors is an integer number (2426463).

Almost surely, 2^28699550 is an apocalyptic number.

28699550 is an abundant number, since it is smaller than the sum of its proper divisors (29535562).

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

28699550 is a wasteful number, since it uses less digits than its factorization.

28699550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52204 (or 52199 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 28699550 is about 5357.1960949736. The cubic root of 28699550 is about 306.1669884687.

The spelling of 28699550 in words is "twenty-eight million, six hundred ninety-nine thousand, five hundred fifty".