1980621504 has 112 divisors (see below), whose sum is σ = 5921654400. Its totient is φ = 648983808.

The previous prime is 1980621491. The next prime is 1980621509. The reversal of 1980621504 is 4051260891.

1980621504 is a `hidden beast` number, since 1 + 98 + 0 + 62 + 1 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1980621509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92239 + ... + 111665.

Almost surely, 2^1980621504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980621504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2960827200).

1980621504 is an abundant number, since it is smaller than the sum of its proper divisors (3941032896).

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

1980621504 is a wasteful number, since it uses less digits than its factorization.

1980621504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19507 (or 19491 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1980621504 is about 44504.1740064907. The cubic root of 1980621504 is about 1255.8386069280.

The spelling of 1980621504 in words is "one billion, nine hundred eighty million, six hundred twenty-one thousand, five hundred four".