3949778632 has 16 divisors (see below), whose sum is σ = 7406617500. Its totient is φ = 1974680640.

The previous prime is 3949778597. The next prime is 3949778639. The reversal of 3949778632 is 2368779493.

It can be written as a sum of positive squares in 2 ways, for example, as 3226921636 + 722856996 = 56806^2 + 26886^2 .

It is not an unprimeable number, because it can be changed into a prime (3949778639) 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, 79494 + ... + 119242.

Almost surely, 2^3949778632 is an apocalyptic number.

It is an amenable number.

3949778632 is a deficient number, since it is larger than the sum of its proper divisors (3456838868).

3949778632 is a wasteful number, since it uses less digits than its factorization.

3949778632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52176 (or 52172 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 58.

The square root of 3949778632 is about 62847.2643159589. The cubic root of 3949778632 is about 1580.7295984142.

The spelling of 3949778632 in words is "three billion, nine hundred forty-nine million, seven hundred seventy-eight thousand, six hundred thirty-two".