15768945 has 32 divisors (see below), whose sum is σ = 29687040. Its totient is φ = 7914240.

The previous prime is 15768913. The next prime is 15768971. The reversal of 15768945 is 54986751.

It is not a de Polignac number, because 15768945 - 2⁵ = 15768913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 15768945.

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 31 ways as a sum of consecutive naturals, for example, 1141 + ... + 5730.

It is an arithmetic number, because the mean of its divisors is an integer number (927720).

Almost surely, 2^15768945 is an apocalyptic number.

15768945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15768945 is a deficient number, since it is larger than the sum of its proper divisors (13918095).

15768945 is a wasteful number, since it uses less digits than its factorization.

15768945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6902 (or 6896 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 15768945 is about 3971.0130949167. The cubic root of 15768945 is about 250.7653611647.

The spelling of 15768945 in words is "fifteen million, seven hundred sixty-eight thousand, nine hundred forty-five".