3991740264 has 160 divisors (see below), whose sum is σ = 11880772200. Its totient is φ = 1249758720.

The previous prime is 3991740253. The next prime is 3991740289. The reversal of 3991740264 is 4620471993.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3899003364 + 92736900 = 62442^2 + 9630^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 692434 + ... + 698174.

Almost surely, 2^3991740264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3991740264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5940386100).

3991740264 is an abundant number, since it is smaller than the sum of its proper divisors (7889031936).

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

3991740264 is a wasteful number, since it uses less digits than its factorization.

3991740264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 3991740264 is about 63180.2205124357. The cubic root of 3991740264 is about 1586.3076729027.

It can be divided in two parts, 3991740 and 264, that added together give a square (3992004 = 1998²).

The spelling of 3991740264 in words is "three billion, nine hundred ninety-one million, seven hundred forty thousand, two hundred sixty-four".