28507469664 has 48 divisors (see below), whose sum is σ = 74840794560. Its totient is φ = 9501386880.

The previous prime is 28507469611. The next prime is 28507469693. The reversal of 28507469664 is 46696470582.

It is a tau number, because it is divible by the number of its divisors (48).

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, 1616607 + ... + 1634145.

It is an arithmetic number, because the mean of its divisors is an integer number (1559183220).

Almost surely, 2^28507469664 is an apocalyptic number.

28507469664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28507469664 is an abundant number, since it is smaller than the sum of its proper divisors (46333324896).

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

28507469664 is a wasteful number, since it uses less digits than its factorization.

28507469664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34483 (or 34475 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 28507469664 in words is "twenty-eight billion, five hundred seven million, four hundred sixty-nine thousand, six hundred sixty-four".