22378493 has 4 divisors (see below), whose sum is σ = 22435260. Its totient is φ = 22321728.

The previous prime is 22378487. The next prime is 22378507. The reversal of 22378493 is 39487322.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7300804 + 15077689 = 2702^2 + 3883^2 .

It is a cyclic number.

It is not a de Polignac number, because 22378493 - 2⁶ = 22378429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22378423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27788 + ... + 28581.

It is an arithmetic number, because the mean of its divisors is an integer number (5608815).

Almost surely, 2^22378493 is an apocalyptic number.

It is an amenable number.

22378493 is a deficient number, since it is larger than the sum of its proper divisors (56767).

22378493 is an equidigital number, since it uses as much as digits as its factorization.

22378493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56766.

The product of its digits is 72576, while the sum is 38.

The square root of 22378493 is about 4730.5911892701. The cubic root of 22378493 is about 281.8017023852.

The spelling of 22378493 in words is "twenty-two million, three hundred seventy-eight thousand, four hundred ninety-three".