23138378 has 8 divisors (see below), whose sum is σ = 34729860. Its totient is φ = 11561760.

The previous prime is 23138303. The next prime is 23138387. The reversal of 23138378 is 87383132.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 3751969 = 4403^2 + 1937^2 .

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

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, 1838 + ... + 7046.

Almost surely, 2^23138378 is an apocalyptic number.

23138378 is a deficient number, since it is larger than the sum of its proper divisors (11591482).

23138378 is a wasteful number, since it uses less digits than its factorization.

23138378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7432.

The product of its digits is 24192, while the sum is 35.

The square root of 23138378 is about 4810.2367925082. The cubic root of 23138378 is about 284.9558893463.

The spelling of 23138378 in words is "twenty-three million, one hundred thirty-eight thousand, three hundred seventy-eight".