997327980 has 216 divisors, whose sum is σ = 3442093200. Its totient is φ = 233291520.

The previous prime is 997327973. The next prime is 997327997. The reversal of 997327980 is 89723799.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 630831 + ... + 632409.

Almost surely, 2^997327980 is an apocalyptic number.

997327980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a pronic number, being equal to 31580×31581.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997327980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721046600).

997327980 is an abundant number, since it is smaller than the sum of its proper divisors (2444765220).

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

997327980 is a wasteful number, since it uses less digits than its factorization.

997327980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 997327980 is about 31580.4999960419. The cubic root of 997327980 is about 999.1085321880.

The spelling of 997327980 in words is "nine hundred ninety-seven million, three hundred twenty-seven thousand, nine hundred eighty".