993689450 has 72 divisors (see below), whose sum is σ = 2023482468. Its totient is φ = 360898560.

The previous prime is 993689443. The next prime is 993689461. The reversal of 993689450 is 54986399.

It can be written as a sum of positive squares in 18 ways, for example, as 515698681 + 477990769 = 22709^2 + 21863^2 .

It is a junction number, because it is equal to n+sod(n) for n = 993689392 and 993689401.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5148554 + ... + 5148746.

Almost surely, 2^993689450 is an apocalyptic number.

993689450 is an abundant number, since it is smaller than the sum of its proper divisors (1029793018).

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

993689450 is a wasteful number, since it uses less digits than its factorization.

993689450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 993689450 is about 31522.8401321962. The cubic root of 993689450 is about 997.8920429727.

The spelling of 993689450 in words is "nine hundred ninety-three million, six hundred eighty-nine thousand, four hundred fifty".