1865525828 has 12 divisors (see below), whose sum is σ = 3282909840. Its totient is φ = 927551592.

The previous prime is 1865525807. The next prime is 1865525839. The reversal of 1865525828 is 8285255681.

It is a super-2 number, since 2×1865525828² = 6960373229870171168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302026 + ... + 1303457.

It is an arithmetic number, because the mean of its divisors is an integer number (273575820).

Almost surely, 2^1865525828 is an apocalyptic number.

It is an amenable number.

1865525828 is a deficient number, since it is larger than the sum of its proper divisors (1417384012).

1865525828 is a wasteful number, since it uses less digits than its factorization.

1865525828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605666 (or 2605664 counting only the distinct ones).

The product of its digits is 1536000, while the sum is 50.

The square root of 1865525828 is about 43191.7333294231. The cubic root of 1865525828 is about 1231.0256120659.

The spelling of 1865525828 in words is "one billion, eight hundred sixty-five million, five hundred twenty-five thousand, eight hundred twenty-eight".