724780 has 48 divisors (see below), whose sum is σ = 1806336. Its totient is φ = 239040.

The previous prime is 724777. The next prime is 724781. The reversal of 724780 is 87427.

724780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (724781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4257 + ... + 4423.

It is an arithmetic number, because the mean of its divisors is an integer number (37632).

2⁷²⁴⁷⁸⁰ is an apocalyptic number.

724780 is a gapful number since it is divisible by the number (70) 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 724780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903168).

724780 is an abundant number, since it is smaller than the sum of its proper divisors (1081556).

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

724780 is a wasteful number, since it uses less digits than its factorization.

724780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 724780 is about 851.3401200460. The cubic root of 724780 is about 89.8260012703.

The spelling of 724780 in words is "seven hundred twenty-four thousand, seven hundred eighty".