23281642 has 8 divisors (see below), whose sum is σ = 34943076. Its totient is φ = 11633952.

The previous prime is 23281613. The next prime is 23281663. The reversal of 23281642 is 24618232.

It can be written as a sum of positive squares in 2 ways, for example, as 23242041 + 39601 = 4821^2 + 199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23281642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4158 + ... + 7990.

Almost surely, 2^23281642 is an apocalyptic number.

23281642 is a deficient number, since it is larger than the sum of its proper divisors (11661434).

23281642 is a wasteful number, since it uses less digits than its factorization.

23281642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872.

The product of its digits is 4608, while the sum is 28.

The square root of 23281642 is about 4825.1053874501. The cubic root of 23281642 is about 285.5427923953.

Adding to 23281642 its reverse (24618232), we get a palindrome (47899874).

The spelling of 23281642 in words is "twenty-three million, two hundred eighty-one thousand, six hundred forty-two".