28995904 has 56 divisors (see below), whose sum is σ = 66934080. Its totient is φ = 12205056.

The previous prime is 28995899. The next prime is 28995917. The reversal of 28995904 is 40959982.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25884 + ... + 26980.

Almost surely, 2^28995904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28995904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33467040).

28995904 is an abundant number, since it is smaller than the sum of its proper divisors (37938176).

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

28995904 is a wasteful number, since it uses less digits than its factorization.

28995904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 28995904 is about 5384.7844896523. The cubic root of 28995904 is about 307.2172172787.

The spelling of 28995904 in words is "twenty-eight million, nine hundred ninety-five thousand, nine hundred four".