28912408 has 16 divisors (see below), whose sum is σ = 61955280. Its totient is φ = 12391008.

The previous prime is 28912381. The next prime is 28912463. The reversal of 28912408 is 80421982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258091 + ... + 258202.

It is an arithmetic number, because the mean of its divisors is an integer number (3872205).

Almost surely, 2^28912408 is an apocalyptic number.

28912408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28912408 is an abundant number, since it is smaller than the sum of its proper divisors (33042872).

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

28912408 is a wasteful number, since it uses less digits than its factorization.

28912408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516306 (or 516302 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28912408 is about 5377.0259437723. The cubic root of 28912408 is about 306.9220483473.

The spelling of 28912408 in words is "twenty-eight million, nine hundred twelve thousand, four hundred eight".