997093920 has 192 divisors, whose sum is σ = 3276370944. Its totient is φ = 254607360.

The previous prime is 997093873. The next prime is 997093927. The reversal of 997093920 is 29390799.

It is a happy number.

997093920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 997093920.

It is not an unprimeable number, because it can be changed into a prime (997093927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1681144 + ... + 1681736.

It is an arithmetic number, because the mean of its divisors is an integer number (17064432).

Almost surely, 2^997093920 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 997093920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1638185472).

997093920 is an abundant number, since it is smaller than the sum of its proper divisors (2279277024).

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

997093920 is a wasteful number, since it uses less digits than its factorization.

997093920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 48.

The square root of 997093920 is about 31576.7940107922. The cubic root of 997093920 is about 999.0303667820.

The spelling of 997093920 in words is "nine hundred ninety-seven million, ninety-three thousand, nine hundred twenty".