22378438 has 8 divisors (see below), whose sum is σ = 33597432. Its totient is φ = 11179296.

The previous prime is 22378429. The next prime is 22378441. The reversal of 22378438 is 83487322.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 22378397 and 22378406.

It is a congruent number.

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, 1720 + ... + 6907.

It is an arithmetic number, because the mean of its divisors is an integer number (4199679).

Almost surely, 2^22378438 is an apocalyptic number.

22378438 is a deficient number, since it is larger than the sum of its proper divisors (11218994).

22378438 is a wasteful number, since it uses less digits than its factorization.

22378438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9926.

The product of its digits is 64512, while the sum is 37.

The square root of 22378438 is about 4730.5853760396. The cubic root of 22378438 is about 281.8014715220.

The spelling of 22378438 in words is "twenty-two million, three hundred seventy-eight thousand, four hundred thirty-eight".