28360660 has 48 divisors (see below), whose sum is σ = 62092800. Its totient is φ = 10869120.

The previous prime is 28360621. The next prime is 28360663. The reversal of 28360660 is 6606382.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28360663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92227 + ... + 92533.

It is an arithmetic number, because the mean of its divisors is an integer number (1293600).

Almost surely, 2^28360660 is an apocalyptic number.

28360660 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 28360660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046400).

28360660 is an abundant number, since it is smaller than the sum of its proper divisors (33732140).

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

28360660 is a wasteful number, since it uses less digits than its factorization.

28360660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28360660 is about 5325.4727489679. The cubic root of 28360660 is about 304.9571201924.

The spelling of 28360660 in words is "twenty-eight million, three hundred sixty thousand, six hundred sixty".