28457472764 has 24 divisors (see below), whose sum is σ = 57212940288. Its totient is φ = 12132203760.

The previous prime is 28457472761. The next prime is 28457472781. The reversal of 28457472764 is 46727475482.

It is a super-2 number, since 2×28457472764² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457472761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2655224 + ... + 2665919.

It is an arithmetic number, because the mean of its divisors is an integer number (2383872512).

Almost surely, 2^28457472764 is an apocalyptic number.

It is an amenable number.

28457472764 is an abundant number, since it is smaller than the sum of its proper divisors (28755467524).

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

28457472764 is a wasteful number, since it uses less digits than its factorization.

28457472764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321345 (or 5321343 counting only the distinct ones).

The product of its digits is 21073920, while the sum is 56.

The spelling of 28457472764 in words is "twenty-eight billion, four hundred fifty-seven million, four hundred seventy-two thousand, seven hundred sixty-four".