28311360 has 224 divisors, whose sum is σ = 112361472. Its totient is φ = 5867520.

The previous prime is 28311331. The next prime is 28311373. The reversal of 28311360 is 6311382.

It is a tau number, because it is divible by the number of its divisors (224).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28311360.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73729 + ... + 74111.

Almost surely, 2^28311360 is an apocalyptic number.

28311360 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 28311360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56180736).

28311360 is an abundant number, since it is smaller than the sum of its proper divisors (84050112).

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

28311360 is a wasteful number, since it uses less digits than its factorization.

28311360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 28311360 is about 5320.8420386251. The cubic root of 28311360 is about 304.7803130002.

The spelling of 28311360 in words is "twenty-eight million, three hundred eleven thousand, three hundred sixty".