28747385 has 8 divisors (see below), whose sum is σ = 35609856. Its totient is φ = 22255920.

The previous prime is 28747379. The next prime is 28747387. The reversal of 28747385 is 58374782.

It is a happy number.

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

It is not a de Polignac number, because 28747385 - 2⁸ = 28747129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28747387) 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, 92579 + ... + 92888.

It is an arithmetic number, because the mean of its divisors is an integer number (4451232).

Almost surely, 2^28747385 is an apocalyptic number.

It is an amenable number.

28747385 is a deficient number, since it is larger than the sum of its proper divisors (6862471).

28747385 is a wasteful number, since it uses less digits than its factorization.

28747385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185503.

The product of its digits is 376320, while the sum is 44.

The square root of 28747385 is about 5361.6587918293. The cubic root of 28747385 is about 306.3369954157.

The spelling of 28747385 in words is "twenty-eight million, seven hundred forty-seven thousand, three hundred eighty-five".