612440 has 32 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 240000.

The previous prime is 612439. The next prime is 612481. The reversal of 612440 is 44216.

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, 2315 + ... + 2565.

2⁶¹²⁴⁴⁰ 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 612440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703080).

612440 is an abundant number, since it is smaller than the sum of its proper divisors (793720).

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

612440 is a wasteful number, since it uses less digits than its factorization.

612440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 612440 is about 782.5854585922. The cubic root of 612440 is about 84.9221894615.

Adding to 612440 its reverse (44216), we get a palindrome (656656).

The spelling of 612440 in words is "six hundred twelve thousand, four hundred forty".