724356 has 48 divisors (see below), whose sum is σ = 1982400. Its totient is φ = 228096.

The previous prime is 724331. The next prime is 724393. The reversal of 724356 is 653427.

It is a happy number.

It is a super-2 number, since 2×724356² = 1049383229472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1876 + ... + 2228.

It is an arithmetic number, because the mean of its divisors is an integer number (41300).

2⁷²⁴³⁵⁶ is an apocalyptic number.

724356 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 724356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991200).

724356 is an abundant number, since it is smaller than the sum of its proper divisors (1258044).

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

724356 is a wasteful number, since it uses less digits than its factorization.

724356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 377 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 724356 is about 851.0910644579. The cubic root of 724356 is about 89.8084816304.

The spelling of 724356 in words is "seven hundred twenty-four thousand, three hundred fifty-six".