1620342912 has 64 divisors (see below), whose sum is σ = 4329092160. Its totient is φ = 536970240.

The previous prime is 1620342883. The next prime is 1620342917. The reversal of 1620342912 is 2192430261.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1620342912² = 5251022304937279488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1620342912.

It is not an unprimeable number, because it can be changed into a prime (1620342917) 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, 54237 + ... + 78627.

It is an arithmetic number, because the mean of its divisors is an integer number (67642065).

Almost surely, 2^1620342912 is an apocalyptic number.

1620342912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620342912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2164546080).

1620342912 is an abundant number, since it is smaller than the sum of its proper divisors (2708749248).

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

1620342912 is a wasteful number, since it uses less digits than its factorization.

1620342912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24581 (or 24569 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1620342912 is about 40253.4832281630. The cubic root of 1620342912 is about 1174.5431541027.

The spelling of 1620342912 in words is "one billion, six hundred twenty million, three hundred forty-two thousand, nine hundred twelve".