28747758 has 64 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 8373120.

The previous prime is 28747717. The next prime is 28747759. The reversal of 28747758 is 85774782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28747759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160513 + ... + 160691.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^28747758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28747758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

28747758 is an abundant number, since it is smaller than the sum of its proper divisors (36570642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28747758 is a wasteful number, since it uses less digits than its factorization.

28747758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its digits is 878080, while the sum is 48.

The square root of 28747758 is about 5361.6935757277. The cubic root of 28747758 is about 306.3383203270.

The spelling of 28747758 in words is "twenty-eight million, seven hundred forty-seven thousand, seven hundred fifty-eight".