3720434636 has 12 divisors (see below), whose sum is σ = 6519321480. Its totient is φ = 1857771360.

The previous prime is 3720434633. The next prime is 3720434671. The reversal of 3720434636 is 6364340273.

It is a self number, because there is not a number n which added to its sum of digits gives 3720434636.

It is not an unprimeable number, because it can be changed into a prime (3720434633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608066 + ... + 614153.

It is an arithmetic number, because the mean of its divisors is an integer number (543276790).

Almost surely, 2^3720434636 is an apocalyptic number.

It is an amenable number.

3720434636 is a deficient number, since it is larger than the sum of its proper divisors (2798886844).

3720434636 is a wasteful number, since it uses less digits than its factorization.

3720434636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222984 (or 1222982 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 38.

The square root of 3720434636 is about 60995.3656928131. The cubic root of 3720434636 is about 1549.5225218143.

The spelling of 3720434636 in words is "three billion, seven hundred twenty million, four hundred thirty-four thousand, six hundred thirty-six".