28452864 has 96 divisors (see below), whose sum is σ = 82948320. Its totient is φ = 8601600.

The previous prime is 28452841. The next prime is 28452871. The reversal of 28452864 is 46825482.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67374 + ... + 67794.

It is an arithmetic number, because the mean of its divisors is an integer number (864045).

Almost surely, 2^28452864 is an apocalyptic number.

28452864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28452864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41474160).

28452864 is an abundant number, since it is smaller than the sum of its proper divisors (54495456).

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

28452864 is a wasteful number, since it uses less digits than its factorization.

28452864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 437 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The square root of 28452864 is about 5334.1226082646. The cubic root of 28452864 is about 305.2872470800.

The spelling of 28452864 in words is "twenty-eight million, four hundred fifty-two thousand, eight hundred sixty-four".