997383996 has 96 divisors (see below), whose sum is σ = 2963036160. Its totient is φ = 284212800.

The previous prime is 997383923. The next prime is 997384001. The reversal of 997383996 is 699383799.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324306 + ... + 327366.

It is an arithmetic number, because the mean of its divisors is an integer number (30864960).

Almost surely, 2^997383996 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 997383996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481518080).

997383996 is an abundant number, since it is smaller than the sum of its proper divisors (1965652164).

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

997383996 is a wasteful number, since it uses less digits than its factorization.

997383996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3504 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The square root of 997383996 is about 31581.3868599845. The cubic root of 997383996 is about 999.1272371733.

The spelling of 997383996 in words is "nine hundred ninety-seven million, three hundred eighty-three thousand, nine hundred ninety-six".