22489378 has 4 divisors (see below), whose sum is σ = 33734070. Its totient is φ = 11244688.

The previous prime is 22489339. The next prime is 22489409. The reversal of 22489378 is 87398422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87398422 = 2 ⋅43699211.

It can be written as a sum of positive squares in only one way, i.e., 21372129 + 1117249 = 4623^2 + 1057^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5622343 + ... + 5622346.

Almost surely, 2^22489378 is an apocalyptic number.

22489378 is a deficient number, since it is larger than the sum of its proper divisors (11244692).

22489378 is a wasteful number, since it uses less digits than its factorization.

22489378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11244691.

The product of its digits is 193536, while the sum is 43.

The square root of 22489378 is about 4742.2967009667. The cubic root of 22489378 is about 282.2663764063.

The spelling of 22489378 in words is "twenty-two million, four hundred eighty-nine thousand, three hundred seventy-eight".