28010761 has 4 divisors (see below), whose sum is σ = 28023300. Its totient is φ = 27998224.

The previous prime is 28010729. The next prime is 28010767. The reversal of 28010761 is 16701082.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26460736 + 1550025 = 5144^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 28010761 - 2⁵ = 28010729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28010767) 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, 1906 + ... + 7723.

It is an arithmetic number, because the mean of its divisors is an integer number (7005825).

Almost surely, 2^28010761 is an apocalyptic number.

It is an amenable number.

28010761 is a deficient number, since it is larger than the sum of its proper divisors (12539).

28010761 is an equidigital number, since it uses as much as digits as its factorization.

28010761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12538.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 28010761 is about 5292.5193433751. The cubic root of 28010761 is about 303.6977930789.

The spelling of 28010761 in words is "twenty-eight million, ten thousand, seven hundred sixty-one".