28940747 has 8 divisors (see below), whose sum is σ = 31648320. Its totient is φ = 26245960.

The previous prime is 28940731. The next prime is 28940789. The reversal of 28940747 is 74704982.

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 28940747 - 2⁴ = 28940731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28940707) 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, 1904 + ... + 7842.

It is an arithmetic number, because the mean of its divisors is an integer number (3956040).

Almost surely, 2^28940747 is an apocalyptic number.

28940747 is a deficient number, since it is larger than the sum of its proper divisors (2707573).

28940747 is a wasteful number, since it uses less digits than its factorization.

28940747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393.

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

The square root of 28940747 is about 5379.6604911463. The cubic root of 28940747 is about 307.0222939314.

The spelling of 28940747 in words is "twenty-eight million, nine hundred forty thousand, seven hundred forty-seven".