997092180 has 432 divisors, whose sum is σ = 3764517120. Its totient is φ = 220776192.

The previous prime is 997092179. The next prime is 997092193. The reversal of 997092180 is 81290799.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12621381 + ... + 12621459.

It is an arithmetic number, because the mean of its divisors is an integer number (8714160).

Almost surely, 2^997092180 is an apocalyptic number.

997092180 is a gapful number since it is divisible by the number (90) 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 997092180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882258560).

997092180 is an abundant number, since it is smaller than the sum of its proper divisors (2767424940).

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

997092180 is a wasteful number, since it uses less digits than its factorization.

997092180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 997092180 is about 31576.7664589014. The cubic root of 997092180 is about 999.0297856552.

The spelling of 997092180 in words is "nine hundred ninety-seven million, ninety-two thousand, one hundred eighty".