724918 has 4 divisors (see below), whose sum is σ = 1087380. Its totient is φ = 362458.

The previous prime is 724903. The next prime is 724939. The reversal of 724918 is 819427.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×724918² = 1051012213448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 724918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181228 + ... + 181231.

It is an arithmetic number, because the mean of its divisors is an integer number (271845).

2⁷²⁴⁹¹⁸ is an apocalyptic number.

724918 is a deficient number, since it is larger than the sum of its proper divisors (362462).

724918 is a wasteful number, since it uses less digits than its factorization.

724918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362461.

The product of its digits is 4032, while the sum is 31.

The square root of 724918 is about 851.4211648767. The cubic root of 724918 is about 89.8317019433.

The spelling of 724918 in words is "seven hundred twenty-four thousand, nine hundred eighteen".