28719545272 has 32 divisors (see below), whose sum is σ = 62200087920. Its totient is φ = 12286435840.

The previous prime is 28719545251. The next prime is 28719545291. The reversal of 28719545272 is 27254591782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9597283 + ... + 9600274.

Almost surely, 2^28719545272 is an apocalyptic number.

28719545272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28719545272 is an abundant number, since it is smaller than the sum of its proper divisors (33480542648).

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

28719545272 is a wasteful number, since it uses less digits than its factorization.

28719545272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19197591 (or 19197587 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 52.

The spelling of 28719545272 in words is "twenty-eight billion, seven hundred nineteen million, five hundred forty-five thousand, two hundred seventy-two".