3925987805 has 8 divisors (see below), whose sum is σ = 4726335744. Its totient is φ = 3130690000.

The previous prime is 3925987801. The next prime is 3925987859. The reversal of 3925987805 is 5087895293.

3925987805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3925987805 - 2² = 3925987801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925987801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260821 + ... + 1263930.

It is an arithmetic number, because the mean of its divisors is an integer number (590791968).

Almost surely, 2^3925987805 is an apocalyptic number.

It is an amenable number.

3925987805 is a deficient number, since it is larger than the sum of its proper divisors (800347939).

3925987805 is a wasteful number, since it uses less digits than its factorization.

3925987805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525067.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The square root of 3925987805 is about 62657.7034769070. The cubic root of 3925987805 is about 1577.5494518953.

The spelling of 3925987805 in words is "three billion, nine hundred twenty-five million, nine hundred eighty-seven thousand, eight hundred five".