993439844 has 12 divisors (see below), whose sum is σ = 1771322364. Its totient is φ = 487347744.

The previous prime is 993439831. The next prime is 993439903. The reversal of 993439844 is 448934399.

993439844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 332332900 + 661106944 = 18230^2 + 25712^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342807 + ... + 2343230.

It is an arithmetic number, because the mean of its divisors is an integer number (147610197).

Almost surely, 2^993439844 is an apocalyptic number.

It is an amenable number.

993439844 is a deficient number, since it is larger than the sum of its proper divisors (777882520).

993439844 is a wasteful number, since it uses less digits than its factorization.

993439844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686094 (or 4686092 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 53.

The square root of 993439844 is about 31518.8807542400. The cubic root of 993439844 is about 997.8084820910.

Subtracting from 993439844 its reverse (448934399), we obtain a palindrome (544505445).

The spelling of 993439844 in words is "nine hundred ninety-three million, four hundred thirty-nine thousand, eight hundred forty-four".