28887722 has 8 divisors (see below), whose sum is σ = 44729472. Its totient is φ = 13977900.

The previous prime is 28887707. The next prime is 28887767. The reversal of 28887722 is 22778882.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232904 + ... + 233027.

It is an arithmetic number, because the mean of its divisors is an integer number (5591184).

Almost surely, 2^28887722 is an apocalyptic number.

28887722 is a deficient number, since it is larger than the sum of its proper divisors (15841750).

28887722 is a wasteful number, since it uses less digits than its factorization.

28887722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465964.

The product of its digits is 200704, while the sum is 44.

The square root of 28887722 is about 5374.7299467043. The cubic root of 28887722 is about 306.8346713858.

The spelling of 28887722 in words is "twenty-eight million, eight hundred eighty-seven thousand, seven hundred twenty-two".