3945620456 has 8 divisors (see below), whose sum is σ = 7398038370. Its totient is φ = 1972810224.

The previous prime is 3945620431. The next prime is 3945620473. The reversal of 3945620456 is 6540265493.

It can be written as a sum of positive squares in only one way, i.e., 3615616900 + 330003556 = 60130^2 + 18166^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246601271 + ... + 246601286.

Almost surely, 2^3945620456 is an apocalyptic number.

It is an amenable number.

3945620456 is a deficient number, since it is larger than the sum of its proper divisors (3452417914).

3945620456 is a wasteful number, since it uses less digits than its factorization.

3945620456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493202563 (or 493202559 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 3945620456 is about 62814.1740055539. The cubic root of 3945620456 is about 1580.1746930701.

The spelling of 3945620456 in words is "three billion, nine hundred forty-five million, six hundred twenty thousand, four hundred fifty-six".