15996765 has 48 divisors (see below), whose sum is σ = 28365120. Its totient is φ = 7672320.

The previous prime is 15996749. The next prime is 15996767. The reversal of 15996765 is 56769951.

It is not a de Polignac number, because 15996765 - 2⁴ = 15996749 is a prime.

Its product of digits (510300) is a multiple of the sum of its prime divisors (105).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15996767) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 390145 + ... + 390185.

It is an arithmetic number, because the mean of its divisors is an integer number (590940).

Almost surely, 2^15996765 is an apocalyptic number.

15996765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15996765 is a deficient number, since it is larger than the sum of its proper divisors (12368355).

15996765 is a wasteful number, since it uses less digits than its factorization.

15996765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 105 counting only the distinct ones).

The product of its digits is 510300, while the sum is 48.

The square root of 15996765 is about 3999.5956045580. The cubic root of 15996765 is about 251.9672261485.

It can be divided in two parts, 15996 and 765, that added together give a palindrome (16761).

The spelling of 15996765 in words is "fifteen million, nine hundred ninety-six thousand, seven hundred sixty-five".