993426638 has 8 divisors (see below), whose sum is σ = 1526484960. Its totient is φ = 484598320.

The previous prime is 993426617. The next prime is 993426673. The reversal of 993426638 is 836624399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 6057398 + ... + 6057561.

It is an arithmetic number, because the mean of its divisors is an integer number (190810620).

Almost surely, 2^993426638 is an apocalyptic number.

993426638 is a deficient number, since it is larger than the sum of its proper divisors (533058322).

993426638 is a wasteful number, since it uses less digits than its factorization.

993426638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12115002.

The product of its digits is 1679616, while the sum is 50.

The square root of 993426638 is about 31518.6712600642. The cubic root of 993426638 is about 997.8040607137.

The spelling of 993426638 in words is "nine hundred ninety-three million, four hundred twenty-six thousand, six hundred thirty-eight".