28905960 has 32 divisors (see below), whose sum is σ = 86718240. Its totient is φ = 7708224.

The previous prime is 28905959. The next prime is 28905971. The reversal of 28905960 is 6950982.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 120322 + ... + 120561.

It is an arithmetic number, because the mean of its divisors is an integer number (2709945).

Almost surely, 2^28905960 is an apocalyptic number.

28905960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28905960 is an abundant number, since it is smaller than the sum of its proper divisors (57812280).

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

28905960 is a wasteful number, since it uses less digits than its factorization.

28905960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240897 (or 240893 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 28905960 is about 5376.4263223818. The cubic root of 28905960 is about 306.8992302259.

The spelling of 28905960 in words is "twenty-eight million, nine hundred five thousand, nine hundred sixty".