3900748621 has 16 divisors (see below), whose sum is σ = 5119234560. Its totient is φ = 2879567280.

The previous prime is 3900748619. The next prime is 3900748627. The reversal of 3900748621 is 1268470093.

It is a cyclic number.

It is not a de Polignac number, because 3900748621 - 2¹ = 3900748619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900748627) 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, 1331671 + ... + 1334596.

It is an arithmetic number, because the mean of its divisors is an integer number (319952160).

Almost surely, 2^3900748621 is an apocalyptic number.

It is an amenable number.

3900748621 is a deficient number, since it is larger than the sum of its proper divisors (1218485939).

3900748621 is a wasteful number, since it uses less digits than its factorization.

3900748621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666304.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 3900748621 is about 62455.9734613111. The cubic root of 3900748621 is about 1574.1616260047.

The spelling of 3900748621 in words is "three billion, nine hundred million, seven hundred forty-eight thousand, six hundred twenty-one".