997700328 has 40 divisors (see below), whose sum is σ = 2794486530. Its totient is φ = 332566560.

The previous prime is 997700269. The next prime is 997700329. The reversal of 997700328 is 823007799.

It can be written as a sum of positive squares in only one way, i.e., 935258724 + 62441604 = 30582^2 + 7902^2 .

It is not an unprimeable number, because it can be changed into a prime (997700329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 769183 + ... + 770478.

Almost surely, 2^997700328 is an apocalyptic number.

It is an amenable number.

997700328 is an abundant number, since it is smaller than the sum of its proper divisors (1796786202).

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

997700328 is a wasteful number, since it uses less digits than its factorization.

997700328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539679 (or 1539666 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 997700328 is about 31586.3946660584. The cubic root of 997700328 is about 999.2328543046.

The spelling of 997700328 in words is "nine hundred ninety-seven million, seven hundred thousand, three hundred twenty-eight".