22455478 has 4 divisors (see below), whose sum is σ = 33683220. Its totient is φ = 11227738.

The previous prime is 22455451. The next prime is 22455481. The reversal of 22455478 is 87455422.

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: 87455422 = 2 ⋅43727711.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5613868 + ... + 5613871.

It is an arithmetic number, because the mean of its divisors is an integer number (8420805).

Almost surely, 2^22455478 is an apocalyptic number.

22455478 is a deficient number, since it is larger than the sum of its proper divisors (11227742).

22455478 is a wasteful number, since it uses less digits than its factorization.

22455478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11227741.

The product of its digits is 89600, while the sum is 37.

The square root of 22455478 is about 4738.7211354964. The cubic root of 22455478 is about 282.1244776820.

The spelling of 22455478 in words is "twenty-two million, four hundred fifty-five thousand, four hundred seventy-eight".