28922700 has 72 divisors (see below), whose sum is σ = 84248080. Its totient is φ = 7660800.

The previous prime is 28922687. The next prime is 28922701. The reversal of 28922700 is 722982.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28922701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68490 + ... + 68910.

Almost surely, 2^28922700 is an apocalyptic number.

28922700 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 28922700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42124040).

28922700 is an abundant number, since it is smaller than the sum of its proper divisors (55325380).

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

28922700 is a wasteful number, since it uses less digits than its factorization.

28922700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 28922700 is about 5377.9828932417. The cubic root of 28922700 is about 306.9584625514.

The spelling of 28922700 in words is "twenty-eight million, nine hundred twenty-two thousand, seven hundred".