1980453888 has 308 divisors, whose sum is σ = 6801607840. Its totient is φ = 564350976.

The previous prime is 1980453883. The next prime is 1980453889. The reversal of 1980453888 is 8883540891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980453883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5225283 + ... + 5225661.

Almost surely, 2^1980453888 is an apocalyptic number.

1980453888 is a gapful number since it is divisible by the number (18) 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 1980453888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3400803920).

1980453888 is an abundant number, since it is smaller than the sum of its proper divisors (4821153952).

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

1980453888 is an frugal number, since it uses more digits than its factorization.

1980453888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The square root of 1980453888 is about 44502.2908174399. The cubic root of 1980453888 is about 1255.8031795665.

The spelling of 1980453888 in words is "one billion, nine hundred eighty million, four hundred fifty-three thousand, eight hundred eighty-eight".