28747493 has 8 divisors (see below), whose sum is σ = 31762368. Its totient is φ = 25879744.

The previous prime is 28747487. The next prime is 28747501. The reversal of 28747493 is 39474782.

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 28747493 - 2⁶ = 28747429 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 (28747093) 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, 36371 + ... + 37152.

It is an arithmetic number, because the mean of its divisors is an integer number (3970296).

Almost surely, 2^28747493 is an apocalyptic number.

28747493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28747493 is a deficient number, since it is larger than the sum of its proper divisors (3014875).

28747493 is a wasteful number, since it uses less digits than its factorization.

28747493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73563.

The product of its digits is 338688, while the sum is 44.

The square root of 28747493 is about 5361.6688633298. The cubic root of 28747493 is about 306.3373790373.

The spelling of 28747493 in words is "twenty-eight million, seven hundred forty-seven thousand, four hundred ninety-three".