28722960 has 240 divisors, whose sum is σ = 113742720. Its totient is φ = 6359040.

The previous prime is 28722949. The next prime is 28722983. The reversal of 28722960 is 6922782.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

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 47 ways as a sum of consecutive naturals, for example, 206571 + ... + 206709.

It is an arithmetic number, because the mean of its divisors is an integer number (473928).

Almost surely, 2^28722960 is an apocalyptic number.

28722960 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 28722960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56871360).

28722960 is an abundant number, since it is smaller than the sum of its proper divisors (85019760).

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

28722960 is a wasteful number, since it uses less digits than its factorization.

28722960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28722960 is about 5359.3805612216. The cubic root of 28722960 is about 306.2502118560.

It can be divided in two parts, 2872 and 2960, that added together give a cube (5832 = 18³).

The spelling of 28722960 in words is "twenty-eight million, seven hundred twenty-two thousand, nine hundred sixty".