28622221232 has 20 divisors (see below), whose sum is σ = 60496967976. Its totient is φ = 13010100480.

The previous prime is 28622221231. The next prime is 28622221273. The reversal of 28622221232 is 23212222682.

It is not an unprimeable number, because it can be changed into a prime (28622221231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81312953 + ... + 81313304.

Almost surely, 2^28622221232 is an apocalyptic number.

28622221232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28622221232 is an abundant number, since it is smaller than the sum of its proper divisors (31874746744).

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

28622221232 is a wasteful number, since it uses less digits than its factorization.

28622221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162626276 (or 162626270 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The spelling of 28622221232 in words is "twenty-eight billion, six hundred twenty-two million, two hundred twenty-one thousand, two hundred thirty-two".