1620939480 has 32 divisors (see below), whose sum is σ = 4862818800. Its totient is φ = 432250496.

The previous prime is 1620939473. The next prime is 1620939491. The reversal of 1620939480 is 849390261.

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, 6753795 + ... + 6754034.

Almost surely, 2^1620939480 is an apocalyptic number.

1620939480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620939480 is an abundant number, since it is smaller than the sum of its proper divisors (3241879320).

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

1620939480 is a wasteful number, since it uses less digits than its factorization.

1620939480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13507843 (or 13507839 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1620939480 is about 40260.8926875697. The cubic root of 1620939480 is about 1174.6872818015.

The spelling of 1620939480 in words is "one billion, six hundred twenty million, nine hundred thirty-nine thousand, four hundred eighty".