612444 has 48 divisors (see below), whose sum is σ = 1709568. Its totient is φ = 166848.

The previous prime is 612439. The next prime is 612481. The reversal of 612444 is 444216.

612444 = T₁₉₅ + T₁₉₆ + ... + T₂₂₂.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 612444.

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, 1774 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (35616).

2⁶¹²⁴⁴⁴ 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 612444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854784).

612444 is an abundant number, since it is smaller than the sum of its proper divisors (1097124).

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

612444 is a wasteful number, since it uses less digits than its factorization.

612444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 352 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 612444 is about 782.5880142195. The cubic root of 612444 is about 84.9223743439.

The spelling of 612444 in words is "six hundred twelve thousand, four hundred forty-four".