8722400 has 36 divisors (see below), whose sum is σ = 21295512. Its totient is φ = 3488640.

The previous prime is 8722393. The next prime is 8722409. The reversal of 8722400 is 42278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4652 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (591542).

Almost surely, 2^8722400 is an apocalyptic number.

8722400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8722400 is an abundant number, since it is smaller than the sum of its proper divisors (12573112).

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

8722400 is a wasteful number, since it uses less digits than its factorization.

8722400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10923 (or 10910 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 8722400 is about 2953.3709553661. The cubic root of 8722400 is about 205.8473749302.

Adding to 8722400 its reverse (42278), we get a palindrome (8764678).

The spelling of 8722400 in words is "eight million, seven hundred twenty-two thousand, four hundred".