28250910900 has 54 divisors (see below), whose sum is σ = 88550913542. Its totient is φ = 7533576000.

The previous prime is 28250910851. The next prime is 28250910949. The reversal of 28250910900 is 901905282.

It is an interprime number because it is at equal distance from previous prime (28250910851) and next prime (28250910949).

It can be written as a sum of positive squares in 3 ways, for example, as 4478821776 + 23772089124 = 66924^2 + 154182^2 .

It is a super-2 number, since 2×28250910900² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15694051 + ... + 15695850.

Almost surely, 2^28250910900 is an apocalyptic number.

28250910900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28250910900 is an abundant number, since it is smaller than the sum of its proper divisors (60300002642).

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

28250910900 is a wasteful number, since it uses less digits than its factorization.

28250910900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31389921 (or 31389911 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 28250910900 in words is "twenty-eight billion, two hundred fifty million, nine hundred ten thousand, nine hundred".