28572687540 has 72 divisors (see below), whose sum is σ = 91232100960. Its totient is φ = 7218362304.

The previous prime is 28572687529. The next prime is 28572687547. The reversal of 28572687540 is 4578627582.

28572687540 is a `hidden beast` number, since 2 + 8 + 572 + 68 + 7 + 5 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28572687547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4173874 + ... + 4180713.

Almost surely, 2^28572687540 is an apocalyptic number.

28572687540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28572687540 is an abundant number, since it is smaller than the sum of its proper divisors (62659413420).

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

28572687540 is a wasteful number, since it uses less digits than its factorization.

28572687540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8354621 (or 8354616 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 28572687540 in words is "twenty-eight billion, five hundred seventy-two million, six hundred eighty-seven thousand, five hundred forty".