28061766 has 24 divisors (see below), whose sum is σ = 61214400. Its totient is φ = 9290256.

The previous prime is 28061749. The next prime is 28061767. The reversal of 28061766 is 66716082.

It is a happy number.

It is a super-2 number, since 2×28061766² = 1574925422077512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28061766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061767) 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, 2550 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (2550600).

Almost surely, 2^28061766 is an apocalyptic number.

28061766 is an abundant number, since it is smaller than the sum of its proper divisors (33152634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28061766 is a wasteful number, since it uses less digits than its factorization.

28061766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10620 (or 10617 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28061766 is about 5297.3357454479. The cubic root of 28061766 is about 303.8820164852.

The spelling of 28061766 in words is "twenty-eight million, sixty-one thousand, seven hundred sixty-six".