8515645428 has 48 divisors (see below), whose sum is σ = 20221971840. Its totient is φ = 2788531200.

The previous prime is 8515645427. The next prime is 8515645451. The reversal of 8515645428 is 8245465158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8515645427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221628 + ... + 257196.

It is an arithmetic number, because the mean of its divisors is an integer number (421291080).

Almost surely, 2^8515645428 is an apocalyptic number.

It is an amenable number.

8515645428 is an abundant number, since it is smaller than the sum of its proper divisors (11706326412).

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

8515645428 is a wasteful number, since it uses less digits than its factorization.

8515645428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35928 (or 35926 counting only the distinct ones).

The product of its digits is 1536000, while the sum is 48.

The square root of 8515645428 is about 92280.2548110916. The cubic root of 8515645428 is about 2042.0789254771.

The spelling of 8515645428 in words is "eight billion, five hundred fifteen million, six hundred forty-five thousand, four hundred twenty-eight".