28451835812 has 12 divisors (see below), whose sum is σ = 49792518300. Its totient is φ = 14225402016.

The previous prime is 28451835799. The next prime is 28451835821. The reversal of 28451835812 is 21853815482.

It can be written as a sum of positive squares in 2 ways, for example, as 3795299236 + 24656536576 = 61606^2 + 157024^2 .

It is a super-2 number, since 2×28451835812² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12314 + ... + 238862.

It is an arithmetic number, because the mean of its divisors is an integer number (4149376525).

Almost surely, 2^28451835812 is an apocalyptic number.

It is an amenable number.

28451835812 is a deficient number, since it is larger than the sum of its proper divisors (21340682488).

28451835812 is a wasteful number, since it uses less digits than its factorization.

28451835812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257950 (or 257948 counting only the distinct ones).

The product of its digits is 614400, while the sum is 47.

The spelling of 28451835812 in words is "twenty-eight billion, four hundred fifty-one million, eight hundred thirty-five thousand, eight hundred twelve".