28912330 has 8 divisors (see below), whose sum is σ = 52042212. Its totient is φ = 11564928.

The previous prime is 28912327. The next prime is 28912381. The reversal of 28912330 is 3321982.

It can be written as a sum of positive squares in 2 ways, for example, as 28398241 + 514089 = 5329^2 + 717^2 .

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

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, 1445607 + ... + 1445626.

Almost surely, 2^28912330 is an apocalyptic number.

28912330 is a deficient number, since it is larger than the sum of its proper divisors (23129882).

28912330 is a wasteful number, since it uses less digits than its factorization.

28912330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891240.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 28912330 is about 5377.0186906872. The cubic root of 28912330 is about 306.9217723419.

The spelling of 28912330 in words is "twenty-eight million, nine hundred twelve thousand, three hundred thirty".