15764868 has 108 divisors (see below), whose sum is σ = 48218352. Its totient is φ = 4490640.

The previous prime is 15764863. The next prime is 15764873. The reversal of 15764868 is 86846751.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15764863) and next prime (15764873).

It is a tau number, because it is divible by the number of its divisors (108).

It is not an unprimeable number, because it can be changed into a prime (15764863) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47463 + ... + 47793.

Almost surely, 2^15764868 is an apocalyptic number.

15764868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15764868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24109176).

15764868 is an abundant number, since it is smaller than the sum of its proper divisors (32453484).

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

15764868 is a wasteful number, since it uses less digits than its factorization.

15764868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 343 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 15764868 is about 3970.4997166604. The cubic root of 15764868 is about 250.7437478291.

It can be divided in two parts, 157 and 64868, that added together give a square (65025 = 255²).

The spelling of 15764868 in words is "fifteen million, seven hundred sixty-four thousand, eight hundred sixty-eight".