28890766 has 8 divisors (see below), whose sum is σ = 44070840. Its totient is φ = 14200488.

The previous prime is 28890761. The next prime is 28890781. The reversal of 28890766 is 66709882.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28890761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122301 + ... + 122536.

It is an arithmetic number, because the mean of its divisors is an integer number (5508855).

Almost surely, 2^28890766 is an apocalyptic number.

28890766 is a deficient number, since it is larger than the sum of its proper divisors (15180074).

28890766 is a wasteful number, since it uses less digits than its factorization.

28890766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244898.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 28890766 is about 5375.0131162631. The cubic root of 28890766 is about 306.8454484204.

The spelling of 28890766 in words is "twenty-eight million, eight hundred ninety thousand, seven hundred sixty-six".