28955808 has 144 divisors (see below), whose sum is σ = 96235776. Its totient is φ = 8087040.

The previous prime is 28955737. The next prime is 28955819. The reversal of 28955808 is 80855982.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106713 + ... + 106983.

It is an arithmetic number, because the mean of its divisors is an integer number (668304).

Almost surely, 2^28955808 is an apocalyptic number.

28955808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28955808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48117888).

28955808 is an abundant number, since it is smaller than the sum of its proper divisors (67279968).

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

28955808 is a wasteful number, since it uses less digits than its factorization.

28955808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 28955808 is about 5381.0601186012. The cubic root of 28955808 is about 307.0755436612.

The spelling of 28955808 in words is "twenty-eight million, nine hundred fifty-five thousand, eight hundred eight".