22281878478 has 32 divisors (see below), whose sum is σ = 47360622240. Its totient is φ = 6964398080.

The previous prime is 22281878477. The next prime is 22281878537. The reversal of 22281878478 is 87487818222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22281878477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378603 + ... + 433478.

It is an arithmetic number, because the mean of its divisors is an integer number (1480019445).

Almost surely, 2^22281878478 is an apocalyptic number.

22281878478 is an abundant number, since it is smaller than the sum of its proper divisors (25078743762).

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

22281878478 is a wasteful number, since it uses less digits than its factorization.

22281878478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812372.

The product of its digits is 6422528, while the sum is 57.

The spelling of 22281878478 in words is "twenty-two billion, two hundred eighty-one million, eight hundred seventy-eight thousand, four hundred seventy-eight".