28612320 has 96 divisors (see below), whose sum is σ = 98340480. Its totient is φ = 6935040.

The previous prime is 28612319. The next prime is 28612333. The reversal of 28612320 is 2321682.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 2571 + ... + 7989.

It is an arithmetic number, because the mean of its divisors is an integer number (1024380).

Almost surely, 2^28612320 is an apocalyptic number.

28612320 is a gapful number since it is divisible by the number (20) 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 28612320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49170240).

28612320 is an abundant number, since it is smaller than the sum of its proper divisors (69728160).

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

28612320 is a wasteful number, since it uses less digits than its factorization.

28612320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448 (or 5440 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28612320 is about 5349.0485135209. The cubic root of 28612320 is about 305.8564835994.

The spelling of 28612320 in words is "twenty-eight million, six hundred twelve thousand, three hundred twenty".