28700146 has 8 divisors (see below), whose sum is σ = 45316080. Its totient is φ = 13594788.

The previous prime is 28700143. The next prime is 28700153. The reversal of 28700146 is 64100782.

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

It is not an unprimeable number, because it can be changed into a prime (28700143) 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 3 ways as a sum of consecutive naturals, for example, 377596 + ... + 377671.

It is an arithmetic number, because the mean of its divisors is an integer number (5664510).

Almost surely, 2^28700146 is an apocalyptic number.

28700146 is a deficient number, since it is larger than the sum of its proper divisors (16615934).

28700146 is a wasteful number, since it uses less digits than its factorization.

28700146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755288.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28700146 is about 5357.2517207986. The cubic root of 28700146 is about 306.1691078314.

The spelling of 28700146 in words is "twenty-eight million, seven hundred thousand, one hundred forty-six".