3945729902 has 32 divisors (see below), whose sum is σ = 6399336960. Its totient is φ = 1820035360.

The previous prime is 3945729901. The next prime is 3945729911. The reversal of 3945729902 is 2099275493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945729901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130127 + ... + 157557.

It is an arithmetic number, because the mean of its divisors is an integer number (199979280).

Almost surely, 2^3945729902 is an apocalyptic number.

3945729902 is a deficient number, since it is larger than the sum of its proper divisors (2453607058).

3945729902 is a wasteful number, since it uses less digits than its factorization.

3945729902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27568.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 3945729902 is about 62815.0451882350. The cubic root of 3945729902 is about 1580.1893035480.

The spelling of 3945729902 in words is "three billion, nine hundred forty-five million, seven hundred twenty-nine thousand, nine hundred two".