28227554394 has 64 divisors (see below), whose sum is σ = 61948285056. Its totient is φ = 8522072064.

The previous prime is 28227554357. The next prime is 28227554423. The reversal of 28227554394 is 49345572282.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1332574 + ... + 1353590.

It is an arithmetic number, because the mean of its divisors is an integer number (967941954).

Almost surely, 2^28227554394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28227554394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30974142528).

28227554394 is an abundant number, since it is smaller than the sum of its proper divisors (33720730662).

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

28227554394 is a wasteful number, since it uses less digits than its factorization.

28227554394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21359.

The product of its digits is 4838400, while the sum is 51.

The spelling of 28227554394 in words is "twenty-eight billion, two hundred twenty-seven million, five hundred fifty-four thousand, three hundred ninety-four".