1620384432 has 80 divisors (see below), whose sum is σ = 4262727168. Its totient is φ = 530310400.

The previous prime is 1620384421. The next prime is 1620384497. The reversal of 1620384432 is 2344830261.

It is a junction number, because it is equal to n+sod(n) for n = 1620384393 and 1620384402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688057 + ... + 690407.

Almost surely, 2^1620384432 is an apocalyptic number.

1620384432 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 1620384432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131363584).

1620384432 is an abundant number, since it is smaller than the sum of its proper divisors (2642342736).

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

1620384432 is a wasteful number, since it uses less digits than its factorization.

1620384432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618 (or 2612 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 1620384432 is about 40253.9989566254. The cubic root of 1620384432 is about 1174.5531862621.

The spelling of 1620384432 in words is "one billion, six hundred twenty million, three hundred eighty-four thousand, four hundred thirty-two".