1621970480 has 160 divisors (see below), whose sum is σ = 4245436608. Its totient is φ = 572313600.

The previous prime is 1621970461. The next prime is 1621970509. The reversal of 1621970480 is 840791261.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2346935 + ... + 2347625.

Almost surely, 2^1621970480 is an apocalyptic number.

1621970480 is a gapful number since it is divisible by the number (10) 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 1621970480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122718304).

1621970480 is an abundant number, since it is smaller than the sum of its proper divisors (2623466128).

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

1621970480 is a wasteful number, since it uses less digits than its factorization.

1621970480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1621970480 is about 40273.6946405467. The cubic root of 1621970480 is about 1174.9362826471.

The spelling of 1621970480 in words is "one billion, six hundred twenty-one million, nine hundred seventy thousand, four hundred eighty".