28569930 has 32 divisors (see below), whose sum is σ = 70934400. Its totient is φ = 7355712.

The previous prime is 28569929. The next prime is 28569943. The reversal of 28569930 is 3996582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15550 + ... + 17289.

It is an arithmetic number, because the mean of its divisors is an integer number (2216700).

Almost surely, 2^28569930 is an apocalyptic number.

28569930 is an abundant number, since it is smaller than the sum of its proper divisors (42364470).

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

28569930 is a wasteful number, since it uses less digits than its factorization.

28569930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32878.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 28569930 is about 5345.0846578890. The cubic root of 28569930 is about 305.7053637972.

The spelling of 28569930 in words is "twenty-eight million, five hundred sixty-nine thousand, nine hundred thirty".