28542222 has 12 divisors (see below), whose sum is σ = 61841520. Its totient is φ = 9514068.

The previous prime is 28542221. The next prime is 28542259. The reversal of 28542222 is 22224582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28542221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 792822 + ... + 792857.

It is an arithmetic number, because the mean of its divisors is an integer number (5153460).

Almost surely, 2^28542222 is an apocalyptic number.

28542222 is an abundant number, since it is smaller than the sum of its proper divisors (33299298).

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

28542222 is a wasteful number, since it uses less digits than its factorization.

28542222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585687 (or 1585684 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 28542222 is about 5342.4921151088. The cubic root of 28542222 is about 305.6065043319.

The spelling of 28542222 in words is "twenty-eight million, five hundred forty-two thousand, two hundred twenty-two".