997347028 has 12 divisors (see below), whose sum is σ = 1745695252. Its totient is φ = 498576960.

The previous prime is 997346981. The next prime is 997347047. The reversal of 997347028 is 820743799.

It can be written as a sum of positive squares in 2 ways, for example, as 723179664 + 274167364 = 26892^2 + 16558^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2326 + ... + 44722.

Almost surely, 2^997347028 is an apocalyptic number.

It is an amenable number.

997347028 is a deficient number, since it is larger than the sum of its proper divisors (748348224).

997347028 is a wasteful number, since it uses less digits than its factorization.

997347028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48282 (or 48280 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 997347028 is about 31580.8015731077. The cubic root of 997347028 is about 999.1148928164.

The spelling of 997347028 in words is "nine hundred ninety-seven million, three hundred forty-seven thousand, twenty-eight".