28930878 has 16 divisors (see below), whose sum is σ = 64290960. Its totient is φ = 9643608.

The previous prime is 28930841. The next prime is 28930879. The reversal of 28930878 is 87803982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28930879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267825 + ... + 267932.

It is an arithmetic number, because the mean of its divisors is an integer number (4018185).

Almost surely, 2^28930878 is an apocalyptic number.

28930878 is an abundant number, since it is smaller than the sum of its proper divisors (35360082).

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

28930878 is a wasteful number, since it uses less digits than its factorization.

28930878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535768 (or 535762 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 28930878 is about 5378.7431617433. The cubic root of 28930878 is about 306.9873910371.

The spelling of 28930878 in words is "twenty-eight million, nine hundred thirty thousand, eight hundred seventy-eight".