28651901472 has 96 divisors (see below), whose sum is σ = 83600213760. Its totient is φ = 9546958080.

The previous prime is 28651901431. The next prime is 28651901489. The reversal of 28651901472 is 27410915682.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×28651901472² (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 15 ways as a sum of consecutive naturals, for example, 3132618 + ... + 3141750.

It is an arithmetic number, because the mean of its divisors is an integer number (870835560).

Almost surely, 2^28651901472 is an apocalyptic number.

It is an amenable number.

28651901472 is an abundant number, since it is smaller than the sum of its proper divisors (54948312288).

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

28651901472 is a wasteful number, since it uses less digits than its factorization.

28651901472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12783 (or 12769 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 28651901472 in words is "twenty-eight billion, six hundred fifty-one million, nine hundred one thousand, four hundred seventy-two".