23023720 has 16 divisors (see below), whose sum is σ = 51803460. Its totient is φ = 9209472.

The previous prime is 23023717. The next prime is 23023727. The reversal of 23023720 is 2732032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23020804 + 2916 = 4798^2 + 54^2 .

It is not an unprimeable number, because it can be changed into a prime (23023727) 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, 287757 + ... + 287836.

Almost surely, 2^23023720 is an apocalyptic number.

23023720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23023720 is an abundant number, since it is smaller than the sum of its proper divisors (28779740).

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

23023720 is a wasteful number, since it uses less digits than its factorization.

23023720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575604 (or 575600 counting only the distinct ones).

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

The square root of 23023720 is about 4798.3038669930. The cubic root of 23023720 is about 284.4844274759.

Adding to 23023720 its reverse (2732032), we get a palindrome (25755752).

The spelling of 23023720 in words is "twenty-three million, twenty-three thousand, seven hundred twenty".