8724340 has 12 divisors (see below), whose sum is σ = 18321156. Its totient is φ = 3489728.

The previous prime is 8724329. The next prime is 8724347. The reversal of 8724340 is 434278.

8724340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6492304 + 2232036 = 2548^2 + 1494^2 .

It is a super-2 number, since 2×8724340² = 152228216871200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8724299 and 8724308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8724347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218089 + ... + 218128.

It is an arithmetic number, because the mean of its divisors is an integer number (1526763).

Almost surely, 2^8724340 is an apocalyptic number.

It is an amenable number.

8724340 is an abundant number, since it is smaller than the sum of its proper divisors (9596816).

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

8724340 is a wasteful number, since it uses less digits than its factorization.

8724340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436226 (or 436224 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 8724340 is about 2953.6993753597. The cubic root of 8724340 is about 205.8626350384.

The spelling of 8724340 in words is "eight million, seven hundred twenty-four thousand, three hundred forty".