28622500 has 45 divisors (see below), whose sum is σ = 63182119. Its totient is φ = 11342000.

The previous prime is 28622471. The next prime is 28622519. The reversal of 28622500 is 522682.

The square root of 28622500 is 5350.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 2244004 + 26378496 = 1498^2 + 5136^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 267447 + ... + 267553.

Almost surely, 2^28622500 is an apocalyptic number.

28622500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28622500 is the 5350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28622500

28622500 is an abundant number, since it is smaller than the sum of its proper divisors (34559619).

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

28622500 is an equidigital number, since it uses as much as digits as its factorization.

28622500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The cubic root of 28622500 is about 305.8927529385.

Multiplying 28622500 by its sum of digits (25), we get a square (715562500 = 26750²).

28622500 divided by its sum of digits (25) gives a square (1144900 = 1070²).

The spelling of 28622500 in words is "twenty-eight million, six hundred twenty-two thousand, five hundred".