993689438 has 32 divisors (see below), whose sum is σ = 1760747520. Its totient is φ = 411583680.

The previous prime is 993689399. The next prime is 993689441. The reversal of 993689438 is 834986399.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616778 + ... + 618386.

It is an arithmetic number, because the mean of its divisors is an integer number (55023360).

Almost surely, 2^993689438 is an apocalyptic number.

993689438 is a deficient number, since it is larger than the sum of its proper divisors (767058082).

993689438 is a wasteful number, since it uses less digits than its factorization.

993689438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072.

The product of its digits is 10077696, while the sum is 59.

The square root of 993689438 is about 31522.8399418580. The cubic root of 993689438 is about 997.8920389558.

The spelling of 993689438 in words is "nine hundred ninety-three million, six hundred eighty-nine thousand, four hundred thirty-eight".