28900222 has 8 divisors (see below), whose sum is σ = 46685016. Its totient is φ = 13338552.

The previous prime is 28900217. The next prime is 28900231. The reversal of 28900222 is 22200982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555748 + ... + 555799.

It is an arithmetic number, because the mean of its divisors is an integer number (5835627).

Almost surely, 2^28900222 is an apocalyptic number.

28900222 is a deficient number, since it is larger than the sum of its proper divisors (17784794).

28900222 is a wasteful number, since it uses less digits than its factorization.

28900222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111562.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28900222 is about 5375.8926700596. The cubic root of 28900222 is about 306.8789217922.

The spelling of 28900222 in words is "twenty-eight million, nine hundred thousand, two hundred twenty-two".