28906766 has 24 divisors (see below), whose sum is σ = 53409456. Its totient is φ = 11659200.

The previous prime is 28906747. The next prime is 28906769. The reversal of 28906766 is 66760982.

It is a super-2 number, since 2×28906766² = 1671202241157512, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28906769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7010 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (2225394).

Almost surely, 2^28906766 is an apocalyptic number.

28906766 is a deficient number, since it is larger than the sum of its proper divisors (24502690).

28906766 is a wasteful number, since it uses less digits than its factorization.

28906766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17384 (or 17377 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 28906766 is about 5376.5012787128. The cubic root of 28906766 is about 306.9020826766.

The spelling of 28906766 in words is "twenty-eight million, nine hundred six thousand, seven hundred sixty-six".