993440 has 48 divisors (see below), whose sum is σ = 2685312. Its totient is φ = 340224.

The previous prime is 993437. The next prime is 993451. The reversal of 993440 is 44399.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (55944).

2⁹⁹³⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 993440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342656).

993440 is an abundant number, since it is smaller than the sum of its proper divisors (1691872).

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

993440 is a wasteful number, since it uses less digits than its factorization.

993440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 993440 is about 996.7146030836. The cubic root of 993440 is about 99.7808534320.

The spelling of 993440 in words is "nine hundred ninety-three thousand, four hundred forty".