27722003428 has 144 divisors (see below), whose sum is σ = 63114266880. Its totient is φ = 10557195264.

The previous prime is 27722003417. The next prime is 27722003443. The reversal of 27722003428 is 82430022772.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25132725 + ... + 25133827.

It is an arithmetic number, because the mean of its divisors is an integer number (438293520).

Almost surely, 2^27722003428 is an apocalyptic number.

27722003428 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 27722003428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31557133440).

27722003428 is an abundant number, since it is smaller than the sum of its proper divisors (35392263452).

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

27722003428 is a wasteful number, since it uses less digits than its factorization.

27722003428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1545 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 37.

The spelling of 27722003428 in words is "twenty-seven billion, seven hundred twenty-two million, three thousand, four hundred twenty-eight".