1528872865 has 24 divisors (see below), whose sum is σ = 2010657600. Its totient is φ = 1115360064.

The previous prime is 1528872811. The next prime is 1528872889. The reversal of 1528872865 is 5682788251.

It is not a de Polignac number, because 1528872865 - 2¹⁷ = 1528741793 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59236 + ... + 81034.

It is an arithmetic number, because the mean of its divisors is an integer number (83777400).

Almost surely, 2^1528872865 is an apocalyptic number.

It is an amenable number.

1528872865 is a deficient number, since it is larger than the sum of its proper divisors (481784735).

1528872865 is a wasteful number, since it uses less digits than its factorization.

1528872865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21913 (or 21900 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 52.

The square root of 1528872865 is about 39100.8038919918. The cubic root of 1528872865 is about 1152.0123216857.

The spelling of 1528872865 in words is "one billion, five hundred twenty-eight million, eight hundred seventy-two thousand, eight hundred sixty-five".