28909552 has 40 divisors (see below), whose sum is σ = 64281600. Its totient is φ = 12338112.

The previous prime is 28909541. The next prime is 28909579. The reversal of 28909552 is 25590982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39849 + ... + 40567.

It is an arithmetic number, because the mean of its divisors is an integer number (1607040).

Almost surely, 2^28909552 is an apocalyptic number.

It is an amenable number.

28909552 is an abundant number, since it is smaller than the sum of its proper divisors (35372048).

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

28909552 is a wasteful number, since it uses less digits than its factorization.

28909552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 28909552 is about 5376.7603628951. The cubic root of 28909552 is about 306.9119419801.

The spelling of 28909552 in words is "twenty-eight million, nine hundred nine thousand, five hundred fifty-two".