28373664 has 96 divisors (see below), whose sum is σ = 82385856. Its totient is φ = 8478720.

The previous prime is 28373647. The next prime is 28373677. The reversal of 28373664 is 46637382.

28373664 = T₃₀₇ + T₃₀₈ + ... + T₅₈₃.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102294 + ... + 102570.

It is an arithmetic number, because the mean of its divisors is an integer number (858186).

Almost surely, 2^28373664 is an apocalyptic number.

28373664 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 28373664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41192928).

28373664 is an abundant number, since it is smaller than the sum of its proper divisors (54012192).

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

28373664 is a wasteful number, since it uses less digits than its factorization.

28373664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 390 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 28373664 is about 5326.6935335159. The cubic root of 28373664 is about 305.0037229681.

The spelling of 28373664 in words is "twenty-eight million, three hundred seventy-three thousand, six hundred sixty-four".