28396900 has 72 divisors (see below), whose sum is σ = 71245440. Its totient is φ = 9623040.

The previous prime is 28396891. The next prime is 28396933. The reversal of 28396900 is 969382.

It is a super-2 number, since 2×28396900² = 1612767859220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28396900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78921 + ... + 79279.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^28396900 is an apocalyptic number.

28396900 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 28396900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35622720).

28396900 is an abundant number, since it is smaller than the sum of its proper divisors (42848540).

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

28396900 is a wasteful number, since it uses less digits than its factorization.

28396900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 28396900 is about 5328.8741775351. The cubic root of 28396900 is about 305.0869589904.

The spelling of 28396900 in words is "twenty-eight million, three hundred ninety-six thousand, nine hundred".