28240766 has 8 divisors (see below), whose sum is σ = 43346424. Its totient is φ = 13791960.

The previous prime is 28240739. The next prime is 28240787. The reversal of 28240766 is 66704282.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164105 + ... + 164276.

It is an arithmetic number, because the mean of its divisors is an integer number (5418303).

Almost surely, 2^28240766 is an apocalyptic number.

28240766 is a deficient number, since it is larger than the sum of its proper divisors (15105658).

28240766 is a wasteful number, since it uses less digits than its factorization.

28240766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328426.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28240766 is about 5314.2041737216. The cubic root of 28240766 is about 304.5267802694.

The spelling of 28240766 in words is "twenty-eight million, two hundred forty thousand, seven hundred sixty-six".