744420 has 48 divisors (see below), whose sum is σ = 2197440. Its totient is φ = 187776.

The previous prime is 744409. The next prime is 744431. The reversal of 744420 is 24447.

It is an interprime number because it is at equal distance from previous prime (744409) and next prime (744431).

It is a super-2 number, since 2×744420² = 1108322272800, which contains 22 as substring.

It is a nialpdrome in base 10 and base 15.

It is an unprimeable number.

744420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814 + ... + 1466.

It is an arithmetic number, because the mean of its divisors is an integer number (45780).

2⁷⁴⁴⁴²⁰ 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 744420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098720).

744420 is an abundant number, since it is smaller than the sum of its proper divisors (1453020).

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

744420 is a wasteful number, since it uses less digits than its factorization.

744420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 744420 is about 862.7977746842. The cubic root of 744420 is about 90.6301455659.

Adding to 744420 its reverse (24447), we get a palindrome (768867).

The spelling of 744420 in words is "seven hundred forty-four thousand, four hundred twenty", and thus it is an iban number.