28251285722 has 32 divisors (see below), whose sum is σ = 46969623360. Its totient is φ = 12636673920.

The previous prime is 28251285721. The next prime is 28251285737. The reversal of 28251285722 is 22758215282.

It is a super-2 number, since 2×28251285722² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28251285721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691604 + ... + 731312.

It is an arithmetic number, because the mean of its divisors is an integer number (1467800730).

Almost surely, 2^28251285722 is an apocalyptic number.

28251285722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28251285722 is a deficient number, since it is larger than the sum of its proper divisors (18718337638).

28251285722 is a wasteful number, since it uses less digits than its factorization.

28251285722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40238.

The product of its digits is 358400, while the sum is 44.

The spelling of 28251285722 in words is "twenty-eight billion, two hundred fifty-one million, two hundred eighty-five thousand, seven hundred twenty-two".