744820 has 24 divisors (see below), whose sum is σ = 1580544. Its totient is φ = 294816.

The previous prime is 744817. The next prime is 744823. The reversal of 744820 is 28447.

It is an interprime number because it is at equal distance from previous prime (744817) and next prime (744823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3229 + ... + 3451.

It is an arithmetic number, because the mean of its divisors is an integer number (65856).

2⁷⁴⁴⁸²⁰ is an apocalyptic number.

It is an amenable number.

744820 is an abundant number, since it is smaller than the sum of its proper divisors (835724).

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

744820 is a wasteful number, since it uses less digits than its factorization.

744820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 744820 is about 863.0295475822. The cubic root of 744820 is about 90.6463754572.

The spelling of 744820 in words is "seven hundred forty-four thousand, eight hundred twenty".