693440 has 56 divisors (see below), whose sum is σ = 1810512. Its totient is φ = 250880.

The previous prime is 693437. The next prime is 693487. The reversal of 693440 is 44396.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3422 + ... + 3618.

2⁶⁹³⁴⁴⁰ 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 693440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905256).

693440 is an abundant number, since it is smaller than the sum of its proper divisors (1117072).

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

693440 is a wasteful number, since it uses less digits than its factorization.

693440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 693440 is about 832.7304485847. The cubic root of 693440 is about 88.5121649040.

The spelling of 693440 in words is "six hundred ninety-three thousand, four hundred forty".