997444404 has 144 divisors (see below), whose sum is σ = 2902273920. Its totient is φ = 285880320.

The previous prime is 997444397. The next prime is 997444421. The reversal of 997444404 is 404444799.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 997444404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 882912 + ... + 884040.

It is an arithmetic number, because the mean of its divisors is an integer number (20154680).

Almost surely, 2^997444404 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 997444404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451136960).

997444404 is an abundant number, since it is smaller than the sum of its proper divisors (1904829516).

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

997444404 is a wasteful number, since it uses less digits than its factorization.

997444404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 997444404 is about 31582.3432316223. The cubic root of 997444404 is about 999.1474079601.

The spelling of 997444404 in words is "nine hundred ninety-seven million, four hundred forty-four thousand, four hundred four".