22478845 has 16 divisors (see below), whose sum is σ = 28678320. Its totient is φ = 16856064.

The previous prime is 22478803. The next prime is 22478867. The reversal of 22478845 is 54887422.

It can be written as a sum of positive squares in 8 ways, for example, as 257049 + 22221796 = 507^2 + 4714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22478845 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22478798 and 22478807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31351 + ... + 32059.

It is an arithmetic number, because the mean of its divisors is an integer number (1792395).

Almost surely, 2^22478845 is an apocalyptic number.

It is an amenable number.

22478845 is a deficient number, since it is larger than the sum of its proper divisors (6199475).

22478845 is a wasteful number, since it uses less digits than its factorization.

22478845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 143360, while the sum is 40.

The square root of 22478845 is about 4741.1860330512. The cubic root of 22478845 is about 282.2223026214. Note that the first 3 decimals are identical.

The spelling of 22478845 in words is "twenty-two million, four hundred seventy-eight thousand, eight hundred forty-five".