993997560 has 64 divisors (see below), whose sum is σ = 3011554080. Its totient is φ = 262438400.

The previous prime is 993997553. The next prime is 993997583. The reversal of 993997560 is 65799399.

It is a super-2 number, since 2×993997560² = 1976062298571907200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 993997560.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28887 + ... + 53126.

Almost surely, 2^993997560 is an apocalyptic number.

It is an amenable number.

993997560 is an abundant number, since it is smaller than the sum of its proper divisors (2017556520).

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

993997560 is a wasteful number, since it uses less digits than its factorization.

993997560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82128 (or 82124 counting only the distinct ones).

The product of its (nonzero) digits is 4133430, while the sum is 57.

The square root of 993997560 is about 31527.7268447949. The cubic root of 993997560 is about 997.9951700094.

The spelling of 993997560 in words is "nine hundred ninety-three million, nine hundred ninety-seven thousand, five hundred sixty".