28986900 has 72 divisors (see below), whose sum is σ = 87536064. Its totient is φ = 7392000.

The previous prime is 28986889. The next prime is 28986901. The reversal of 28986900 is 968982.

It is a super-2 number, since 2×28986900² = 1680480743220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28986901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4800 + ... + 9000.

Almost surely, 2^28986900 is an apocalyptic number.

28986900 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 28986900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43768032).

28986900 is an abundant number, since it is smaller than the sum of its proper divisors (58549164).

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

28986900 is a wasteful number, since it uses less digits than its factorization.

28986900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241 (or 4234 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 28986900 is about 5383.9483652799. The cubic root of 28986900 is about 307.1854142787.

The spelling of 28986900 in words is "twenty-eight million, nine hundred eighty-six thousand, nine hundred".