28664328 has 64 divisors (see below), whose sum is σ = 89349120. Its totient is φ = 7444800.

The previous prime is 28664309. The next prime is 28664341. The reversal of 28664328 is 82346682.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5908 + ... + 9603.

It is an arithmetic number, because the mean of its divisors is an integer number (1396080).

Almost surely, 2^28664328 is an apocalyptic number.

28664328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28664328 is an abundant number, since it is smaller than the sum of its proper divisors (60684792).

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

28664328 is a wasteful number, since it uses less digits than its factorization.

28664328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15538 (or 15534 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 28664328 is about 5353.9077317414. The cubic root of 28664328 is about 306.0416876863.

The spelling of 28664328 in words is "twenty-eight million, six hundred sixty-four thousand, three hundred twenty-eight".