3977368857 has 108 divisors (see below), whose sum is σ = 7734439440. Its totient is φ = 1956921120.

The previous prime is 3977368853. The next prime is 3977368919. The reversal of 3977368857 is 7588637793.

3977368857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3977368857 - 2² = 3977368853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 3977368794 and 3977368803.

It is not an unprimeable number, because it can be changed into a prime (3977368853) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1011898 + ... + 1015820.

It is an arithmetic number, because the mean of its divisors is an integer number (71615180).

Almost surely, 2^3977368857 is an apocalyptic number.

It is an amenable number.

3977368857 is a deficient number, since it is larger than the sum of its proper divisors (3757070583).

3977368857 is a wasteful number, since it uses less digits than its factorization.

3977368857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984 (or 3963 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The square root of 3977368857 is about 63066.3845245627. The cubic root of 3977368857 is about 1584.4016631858.

The spelling of 3977368857 in words is "three billion, nine hundred seventy-seven million, three hundred sixty-eight thousand, eight hundred fifty-seven".