1620469632 has 64 divisors (see below), whose sum is σ = 4344710400. Its totient is φ = 535094784.

The previous prime is 1620469621. The next prime is 1620469693. The reversal of 1620469632 is 2369640261.

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

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, 21369 + ... + 60807.

It is an arithmetic number, because the mean of its divisors is an integer number (67886100).

Almost surely, 2^1620469632 is an apocalyptic number.

1620469632 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 1620469632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2172355200).

1620469632 is an abundant number, since it is smaller than the sum of its proper divisors (2724240768).

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

1620469632 is a wasteful number, since it uses less digits than its factorization.

1620469632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39563 (or 39551 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 1620469632 is about 40255.0572226646. The cubic root of 1620469632 is about 1174.5737719486.

The spelling of 1620469632 in words is "one billion, six hundred twenty million, four hundred sixty-nine thousand, six hundred thirty-two".