28736900 has 72 divisors (see below), whose sum is σ = 65766624. Its totient is φ = 10886400.

The previous prime is 28736899. The next prime is 28736909. The reversal of 28736900 is 963782.

It is a super-2 number, since 2×28736900² = 1651618843220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28736909) 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, 176219 + ... + 176381.

Almost surely, 2^28736900 is an apocalyptic number.

28736900 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 28736900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32883312).

28736900 is an abundant number, since it is smaller than the sum of its proper divisors (37029724).

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

28736900 is a wasteful number, since it uses less digits than its factorization.

28736900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 28736900 is about 5360.6809268973. The cubic root of 28736900 is about 306.2997475759.

The spelling of 28736900 in words is "twenty-eight million, seven hundred thirty-six thousand, nine hundred".