3954687920 has 20 divisors (see below), whose sum is σ = 9194649600. Its totient is φ = 1581875136.

The previous prime is 3954687901. The next prime is 3954687929. The reversal of 3954687920 is 297864593.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3954687929) 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, 24716720 + ... + 24716879.

It is an arithmetic number, because the mean of its divisors is an integer number (459732480).

Almost surely, 2^3954687920 is an apocalyptic number.

It is an amenable number.

3954687920 is an abundant number, since it is smaller than the sum of its proper divisors (5239961680).

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

3954687920 is a wasteful number, since it uses less digits than its factorization.

3954687920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49433612 (or 49433606 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 3954687920 is about 62886.3094798860. The cubic root of 3954687920 is about 1581.3842379645.

The spelling of 3954687920 in words is "three billion, nine hundred fifty-four million, six hundred eighty-seven thousand, nine hundred twenty".