28948864 has 32 divisors (see below), whose sum is σ = 65912400. Its totient is φ = 12406272.

The previous prime is 28948861. The next prime is 28948867. The reversal of 28948864 is 46884982.

It is an interprime number because it is at equal distance from previous prime (28948861) and next prime (28948867).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28948861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15259 + ... + 17050.

Almost surely, 2^28948864 is an apocalyptic number.

It is an amenable number.

28948864 is an abundant number, since it is smaller than the sum of its proper divisors (36963536).

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

28948864 is an equidigital number, since it uses as much as digits as its factorization.

28948864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32330 (or 32318 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The square root of 28948864 is about 5380.4148538937. The cubic root of 28948864 is about 307.0509947226.

The spelling of 28948864 in words is "twenty-eight million, nine hundred forty-eight thousand, eight hundred sixty-four".