28890051766 has 16 divisors (see below), whose sum is σ = 44059108608. Its totient is φ = 14203828800.

The previous prime is 28890051763. The next prime is 28890051781. The reversal of 28890051766 is 66715009882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28890051763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378786 + ... + 448618.

It is an arithmetic number, because the mean of its divisors is an integer number (2753694288).

Almost surely, 2^28890051766 is an apocalyptic number.

28890051766 is a deficient number, since it is larger than the sum of its proper divisors (15169056842).

28890051766 is a wasteful number, since it uses less digits than its factorization.

28890051766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73287.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 28890051766 in words is "twenty-eight billion, eight hundred ninety million, fifty-one thousand, seven hundred sixty-six".