1620348864 has 56 divisors (see below), whose sum is σ = 4391759568. Its totient is φ = 526940160.

The previous prime is 1620348859. The next prime is 1620348979. The reversal of 1620348864 is 4688430261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95047 + ... + 110790.

It is an arithmetic number, because the mean of its divisors is an integer number (78424278).

Almost surely, 2^1620348864 is an apocalyptic number.

It is an amenable number.

1620348864 is an abundant number, since it is smaller than the sum of its proper divisors (2771410704).

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

1620348864 is a wasteful number, since it uses less digits than its factorization.

1620348864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205893 (or 205883 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 1620348864 is about 40253.5571595853. The cubic root of 1620348864 is about 1174.5445922494.

The spelling of 1620348864 in words is "one billion, six hundred twenty million, three hundred forty-eight thousand, eight hundred sixty-four".