1915864 has 16 divisors (see below), whose sum is σ = 3643920. Its totient is φ = 944160.

The previous prime is 1915853. The next prime is 1915891. The reversal of 1915864 is 4685191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1119 + ... + 2254.

It is an arithmetic number, because the mean of its divisors is an integer number (227745).

2^1915864 is an apocalyptic number.

It is an amenable number.

1915864 is a deficient number, since it is larger than the sum of its proper divisors (1728056).

1915864 is a wasteful number, since it uses less digits than its factorization.

1915864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450 (or 3446 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 1915864 is about 1384.1473909956. The cubic root of 1915864 is about 124.1999894548.

The spelling of 1915864 in words is "one million, nine hundred fifteen thousand, eight hundred sixty-four".