8724390 has 48 divisors (see below), whose sum is σ = 21585744. Its totient is φ = 2256640.

The previous prime is 8724377. The next prime is 8724421. The reversal of 8724390 is 934278.

8724390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×8724390³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50344 + ... + 50516.

It is an arithmetic number, because the mean of its divisors is an integer number (449703).

Almost surely, 2^8724390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8724390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10792872).

8724390 is an abundant number, since it is smaller than the sum of its proper divisors (12861354).

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

8724390 is a wasteful number, since it uses less digits than its factorization.

8724390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 8724390 is about 2953.7078393098. The cubic root of 8724390 is about 205.8630283102.

The spelling of 8724390 in words is "eight million, seven hundred twenty-four thousand, three hundred ninety".