3998772772 has 12 divisors (see below), whose sum is σ = 7112571676. Its totient is φ = 1966609440.

The previous prime is 3998772769. The next prime is 3998772781. The reversal of 3998772772 is 2772778993.

3998772772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 351337536 + 3647435236 = 18744^2 + 60394^2 .

It is a super-3 number, since 3×3998772772³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a self number, because there is not a number n which added to its sum of digits gives 3998772772.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8193963 + ... + 8194450.

Almost surely, 2^3998772772 is an apocalyptic number.

It is an amenable number.

3998772772 is a deficient number, since it is larger than the sum of its proper divisors (3113798904).

3998772772 is a wasteful number, since it uses less digits than its factorization.

3998772772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16388478 (or 16388476 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 61.

The square root of 3998772772 is about 63235.8503698654. The cubic root of 3998772772 is about 1587.2386934446.

The spelling of 3998772772 in words is "three billion, nine hundred ninety-eight million, seven hundred seventy-two thousand, seven hundred seventy-two".