22387471428 has 120 divisors (see below), whose sum is σ = 64526166432. Its totient is φ = 6020028672.

The previous prime is 22387471427. The next prime is 22387471501. The reversal of 22387471428 is 82417478322.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22387471427) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 466951 + ... + 512657.

Almost surely, 2^22387471428 is an apocalyptic number.

22387471428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22387471428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32263083216).

22387471428 is an abundant number, since it is smaller than the sum of its proper divisors (42138695004).

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

22387471428 is a wasteful number, since it uses less digits than its factorization.

22387471428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45759 (or 45736 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 48.

The spelling of 22387471428 in words is "twenty-two billion, three hundred eighty-seven million, four hundred seventy-one thousand, four hundred twenty-eight".