3972858856 has 8 divisors (see below), whose sum is σ = 7449110370. Its totient is φ = 1986429424.

The previous prime is 3972858823. The next prime is 3972858863. The reversal of 3972858856 is 6588582793.

3972858856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3753522756 + 219336100 = 61266^2 + 14810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3972858794 and 3972858803.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248303671 + ... + 248303686.

Almost surely, 2^3972858856 is an apocalyptic number.

It is an amenable number.

3972858856 is a deficient number, since it is larger than the sum of its proper divisors (3476251514).

3972858856 is a wasteful number, since it uses less digits than its factorization.

3972858856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496607363 (or 496607359 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 61.

The square root of 3972858856 is about 63030.6184009010. The cubic root of 3972858856 is about 1583.8025773830.

The spelling of 3972858856 in words is "three billion, nine hundred seventy-two million, eight hundred fifty-eight thousand, eight hundred fifty-six".