23072320 has 28 divisors (see below), whose sum is σ = 54941724. Its totient is φ = 9228800.

The previous prime is 23072317. The next prime is 23072341. The reversal of 23072320 is 2327032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 17040384 = 2456^2 + 4128^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35731 + ... + 36370.

Almost surely, 2^23072320 is an apocalyptic number.

23072320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23072320 is an abundant number, since it is smaller than the sum of its proper divisors (31869404).

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

23072320 is an equidigital number, since it uses as much as digits as its factorization.

23072320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72118 (or 72108 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 23072320 is about 4803.3654868228. The cubic root of 23072320 is about 284.6844563495.

Adding to 23072320 its reverse (2327032), we get a palindrome (25399352).

The spelling of 23072320 in words is "twenty-three million, seventy-two thousand, three hundred twenty".