1865827828 has 12 divisors (see below), whose sum is σ = 3274296480. Its totient is φ = 930314552.

The previous prime is 1865827807. The next prime is 1865827837. The reversal of 1865827828 is 8287285681.

It is a congruent number.

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, 648226 + ... + 651097.

It is an arithmetic number, because the mean of its divisors is an integer number (272858040).

Almost surely, 2^1865827828 is an apocalyptic number.

It is an amenable number.

1865827828 is a deficient number, since it is larger than the sum of its proper divisors (1408468652).

1865827828 is a wasteful number, since it uses less digits than its factorization.

1865827828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299686 (or 1299684 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 55.

The square root of 1865827828 is about 43195.2292273117. The cubic root of 1865827828 is about 1231.0920365327.

The spelling of 1865827828 in words is "one billion, eight hundred sixty-five million, eight hundred twenty-seven thousand, eight hundred twenty-eight".