24138638 has 16 divisors (see below), whose sum is σ = 38498976. Its totient is φ = 11325600.

The previous prime is 24138637. The next prime is 24138649. The reversal of 24138638 is 83683142.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 24138598 and 24138607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24138637) 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, 2513 + ... + 7388.

It is an arithmetic number, because the mean of its divisors is an integer number (2406186).

Almost surely, 2^24138638 is an apocalyptic number.

24138638 is a deficient number, since it is larger than the sum of its proper divisors (14360338).

24138638 is a wasteful number, since it uses less digits than its factorization.

24138638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979.

The product of its digits is 27648, while the sum is 35.

The square root of 24138638 is about 4913.1087917936. The cubic root of 24138638 is about 289.0042663291.

The spelling of 24138638 in words is "twenty-four million, one hundred thirty-eight thousand, six hundred thirty-eight".