28623225856 has 99 divisors (see below), whose sum is σ = 60978351157. Its totient is φ = 13426442240.

The previous prime is 28623225853. The next prime is 28623225859. The reversal of 28623225856 is 65852232682.

The square root of 28623225856 is 169184.

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

It is an interprime number because it is at equal distance from previous prime (28623225853) and next prime (28623225859).

It can be written as a sum of positive squares in only one way, i.e., 22284518400 + 6338707456 = 149280^2 + 79616^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28623225853) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 92035941 + ... + 92036251.

Almost surely, 2^28623225856 is an apocalyptic number.

28623225856 is the 169184-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28623225856

28623225856 is an abundant number, since it is smaller than the sum of its proper divisors (32355125301).

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

28623225856 is an frugal number, since it uses more digits than its factorization.

28623225856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 330 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 49.

Multiplying 28623225856 by its sum of digits (49), we get a square (1402538066944 = 1184288²).

The spelling of 28623225856 in words is "twenty-eight billion, six hundred twenty-three million, two hundred twenty-five thousand, eight hundred fifty-six".