8720624 has 20 divisors (see below), whose sum is σ = 18432600. Its totient is φ = 3963840.

The previous prime is 8720623. The next prime is 8720627. The reversal of 8720624 is 4260278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720623) 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, 24599 + ... + 24950.

It is an arithmetic number, because the mean of its divisors is an integer number (921630).

Almost surely, 2^8720624 is an apocalyptic number.

It is an amenable number.

8720624 is an abundant number, since it is smaller than the sum of its proper divisors (9711976).

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

8720624 is a wasteful number, since it uses less digits than its factorization.

8720624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49568 (or 49562 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 8720624 is about 2953.0702666886. The cubic root of 8720624 is about 205.8334028677.

The spelling of 8720624 in words is "eight million, seven hundred twenty thousand, six hundred twenty-four".