15798864 has 20 divisors (see below), whose sum is σ = 40813856. Its totient is φ = 5266272.

The previous prime is 15798863. The next prime is 15798877. The reversal of 15798864 is 46889751.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 329143 = 15798864 / (1 + 5 + 7 + 9 + 8 + 8 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15798863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164524 + ... + 164619.

Almost surely, 2^15798864 is an apocalyptic number.

It is an amenable number.

15798864 is an abundant number, since it is smaller than the sum of its proper divisors (25014992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15798864 is a wasteful number, since it uses less digits than its factorization.

15798864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329154 (or 329148 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 15798864 is about 3974.7784843938. The cubic root of 15798864 is about 250.9238564185.

It can be divided in two parts, 15 and 798864, that multiplied together give a triangular number (11982960 = T₄₈₉₅).

The spelling of 15798864 in words is "fifteen million, seven hundred ninety-eight thousand, eight hundred sixty-four".