1980420904 has 128 divisors (see below), whose sum is σ = 4872960000. Its totient is φ = 731969280.

The previous prime is 1980420887. The next prime is 1980420917. The reversal of 1980420904 is 4090240891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1053037 + ... + 1054915.

It is an arithmetic number, because the mean of its divisors is an integer number (38070000).

Almost surely, 2^1980420904 is an apocalyptic number.

1980420904 is a gapful number since it is divisible by the number (14) 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 1980420904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436480000).

1980420904 is an abundant number, since it is smaller than the sum of its proper divisors (2892539096).

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

1980420904 is a wasteful number, since it uses less digits than its factorization.

1980420904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991 (or 1987 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1980420904 is about 44501.9202282328. The cubic root of 1980420904 is about 1255.7962078243.

The spelling of 1980420904 in words is "one billion, nine hundred eighty million, four hundred twenty thousand, nine hundred four".