3944777872 has 40 divisors (see below), whose sum is σ = 9194600000. Its totient is φ = 1601638272.

The previous prime is 3944777797. The next prime is 3944777897. The reversal of 3944777872 is 2787774493.

It is a happy number.

It is a super-2 number, since 2×3944777872² = 31122544918841696768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924747 + ... + 929002.

It is an arithmetic number, because the mean of its divisors is an integer number (229865000).

Almost surely, 2^3944777872 is an apocalyptic number.

It is an amenable number.

3944777872 is an abundant number, since it is smaller than the sum of its proper divisors (5249822128).

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

3944777872 is a wasteful number, since it uses less digits than its factorization.

3944777872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853783 (or 1853777 counting only the distinct ones).

The product of its digits is 16595712, while the sum is 58.

The square root of 3944777872 is about 62807.4666898769. The cubic root of 3944777872 is about 1580.0622033941.

The spelling of 3944777872 in words is "three billion, nine hundred forty-four million, seven hundred seventy-seven thousand, eight hundred seventy-two".