23280144 has 40 divisors (see below), whose sum is σ = 61281792. Its totient is φ = 7612800.

The previous prime is 23280143. The next prime is 23280151. The reversal of 23280144 is 44108232.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (23280143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2032 + ... + 7119.

Almost surely, 2^23280144 is an apocalyptic number.

23280144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

23280144 is an abundant number, since it is smaller than the sum of its proper divisors (38001648).

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

23280144 is a wasteful number, since it uses less digits than its factorization.

23280144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9215 (or 9209 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 23280144 is about 4824.9501551830. The cubic root of 23280144 is about 285.5366680810.

Adding to 23280144 its reverse (44108232), we get a palindrome (67388376).

The spelling of 23280144 in words is "twenty-three million, two hundred eighty thousand, one hundred forty-four".