23390542 has 20 divisors (see below), whose sum is σ = 40939416. Its totient is φ = 10022460.

The previous prime is 23390531. The next prime is 23390551. The reversal of 23390542 is 24509332.

It is a self number, because there is not a number n which added to its sum of digits gives 23390542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2367 + ... + 7237.

Almost surely, 2^23390542 is an apocalyptic number.

23390542 is a deficient number, since it is larger than the sum of its proper divisors (17548874).

23390542 is an frugal number, since it uses more digits than its factorization.

23390542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901 (or 4880 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 23390542 is about 4836.3769497424. The cubic root of 23390542 is about 285.9873093298.

Adding to 23390542 its reverse (24509332), we get a palindrome (47899874).

It can be divided in two parts, 23390 and 542, that added together give a palindrome (23932).

The spelling of 23390542 in words is "twenty-three million, three hundred ninety thousand, five hundred forty-two".