28240367 has 4 divisors (see below), whose sum is σ = 28597920. Its totient is φ = 27882816.

The previous prime is 28240357. The next prime is 28240391. The reversal of 28240367 is 76304282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28240367 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 (28240337) 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, 178658 + ... + 178815.

It is an arithmetic number, because the mean of its divisors is an integer number (7149480).

Almost surely, 2^28240367 is an apocalyptic number.

28240367 is a deficient number, since it is larger than the sum of its proper divisors (357553).

28240367 is an equidigital number, since it uses as much as digits as its factorization.

28240367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357552.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28240367 is about 5314.1666326904. The cubic root of 28240367 is about 304.5253460926.

The spelling of 28240367 in words is "twenty-eight million, two hundred forty thousand, three hundred sixty-seven".