3949699824 has 60 divisors (see below), whose sum is σ = 12632773296. Its totient is φ = 1128485376.

The previous prime is 3949699823. The next prime is 3949699829. The reversal of 3949699824 is 4289969493.

It is a happy number.

3949699824 is a `hidden beast` number, since 39 + 496 + 9 + 98 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949699823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1958169 + ... + 1960184.

Almost surely, 2^3949699824 is an apocalyptic number.

It is an amenable number.

3949699824 is an abundant number, since it is smaller than the sum of its proper divisors (8683073472).

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

3949699824 is a wasteful number, since it uses less digits than its factorization.

3949699824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918374 (or 3918365 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The square root of 3949699824 is about 62846.6373324779. The cubic root of 3949699824 is about 1580.7190851696.

The spelling of 3949699824 in words is "three billion, nine hundred forty-nine million, six hundred ninety-nine thousand, eight hundred twenty-four".