23144740 has 12 divisors (see below), whose sum is σ = 48603996. Its totient is φ = 9257888.

The previous prime is 23144731. The next prime is 23144743. The reversal of 23144740 is 4744132.

It can be written as a sum of positive squares in 2 ways, for example, as 10342656 + 12802084 = 3216^2 + 3578^2 .

It is not an unprimeable number, because it can be changed into a prime (23144743) 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, 578599 + ... + 578638.

It is an arithmetic number, because the mean of its divisors is an integer number (4050333).

Almost surely, 2^23144740 is an apocalyptic number.

23144740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23144740 is an abundant number, since it is smaller than the sum of its proper divisors (25459256).

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

23144740 is a wasteful number, since it uses less digits than its factorization.

23144740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157246 (or 1157244 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 23144740 is about 4810.8980450639. The cubic root of 23144740 is about 284.9820035830.

Adding to 23144740 its reverse (4744132), we get a palindrome (27888872).

The spelling of 23144740 in words is "twenty-three million, one hundred forty-four thousand, seven hundred forty".