22493478 has 32 divisors (see below), whose sum is σ = 51830784. Its totient is φ = 6374592.

The previous prime is 22493477. The next prime is 22493489. The reversal of 22493478 is 87439422.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22493477) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3226 + ... + 7442.

It is an arithmetic number, because the mean of its divisors is an integer number (1619712).

Almost surely, 2^22493478 is an apocalyptic number.

22493478 is an abundant number, since it is smaller than the sum of its proper divisors (29337306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22493478 is a wasteful number, since it uses less digits than its factorization.

22493478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356.

The product of its digits is 96768, while the sum is 39.

The square root of 22493478 is about 4742.7289612627. The cubic root of 22493478 is about 282.2835285306.

The spelling of 22493478 in words is "twenty-two million, four hundred ninety-three thousand, four hundred seventy-eight".