28770774 has 8 divisors (see below), whose sum is σ = 57541560. Its totient is φ = 9590256.

The previous prime is 28770767. The next prime is 28770799. The reversal of 28770774 is 47707782.

It is a happy number.

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

28770774 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397559 + ... + 2397570.

It is an arithmetic number, because the mean of its divisors is an integer number (7192695).

Almost surely, 2^28770774 is an apocalyptic number.

28770774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28770774 is a wasteful number, since it uses less digits than its factorization.

28770774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795134.

The product of its (nonzero) digits is 153664, while the sum is 42.

The square root of 28770774 is about 5363.8394830569. The cubic root of 28770774 is about 306.4200519410.

The spelling of 28770774 in words is "twenty-eight million, seven hundred seventy thousand, seven hundred seventy-four".