28641767 has 8 divisors (see below), whose sum is σ = 35709312. Its totient is φ = 22318200.

The previous prime is 28641751. The next prime is 28641793. The reversal of 28641767 is 76714682.

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

It is a cyclic number.

It is not a de Polignac number, because 28641767 - 2⁴ = 28641751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28644767) 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, 185909 + ... + 186062.

It is an arithmetic number, because the mean of its divisors is an integer number (4463664).

Almost surely, 2^28641767 is an apocalyptic number.

28641767 is a deficient number, since it is larger than the sum of its proper divisors (7067545).

28641767 is a wasteful number, since it uses less digits than its factorization.

28641767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371989.

The product of its digits is 112896, while the sum is 41.

The square root of 28641767 is about 5351.8003512837. The cubic root of 28641767 is about 305.9613739389.

The spelling of 28641767 in words is "twenty-eight million, six hundred forty-one thousand, seven hundred sixty-seven".