28940416 has 32 divisors (see below), whose sum is σ = 57919680. Its totient is φ = 14403840.

The previous prime is 28940399. The next prime is 28940423. The reversal of 28940416 is 61404982.

It is a tau number, because it is divible by the number of its divisors (32).

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, 39445 + ... + 40171.

It is an arithmetic number, because the mean of its divisors is an integer number (1809990).

Almost surely, 2^28940416 is an apocalyptic number.

It is an amenable number.

28940416 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28940416 is an equidigital number, since it uses as much as digits as its factorization.

28940416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28940416 is about 5379.6297270351. The cubic root of 28940416 is about 307.0211234391.

The spelling of 28940416 in words is "twenty-eight million, nine hundred forty thousand, four hundred sixteen".