28877770 has 8 divisors (see below), whose sum is σ = 51980004. Its totient is φ = 11551104.

The previous prime is 28877753. The next prime is 28877809. The reversal of 28877770 is 7777882.

It can be written as a sum of positive squares in 2 ways, for example, as 26594649 + 2283121 = 5157^2 + 1511^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28877770.

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, 1443879 + ... + 1443898.

Almost surely, 2^28877770 is an apocalyptic number.

28877770 is a deficient number, since it is larger than the sum of its proper divisors (23102234).

28877770 is a wasteful number, since it uses less digits than its factorization.

28877770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887784.

The product of its (nonzero) digits is 307328, while the sum is 46.

The square root of 28877770 is about 5373.8040529964. The cubic root of 28877770 is about 306.7994318542.

The spelling of 28877770 in words is "twenty-eight million, eight hundred seventy-seven thousand, seven hundred seventy".