28730894 has 4 divisors (see below), whose sum is σ = 43096344. Its totient is φ = 14365446.

The previous prime is 28730881. The next prime is 28730917. The reversal of 28730894 is 49803782.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×28730894⁴ (a number of 31 digits) contains 4444 as substring.

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 as a sum of consecutive naturals, namely, 7182722 + ... + 7182725.

It is an arithmetic number, because the mean of its divisors is an integer number (10774086).

Almost surely, 2^28730894 is an apocalyptic number.

28730894 is a deficient number, since it is larger than the sum of its proper divisors (14365450).

28730894 is a wasteful number, since it uses less digits than its factorization.

28730894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14365449.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28730894 is about 5360.1207075961. The cubic root of 28730894 is about 306.2784072497.

The spelling of 28730894 in words is "twenty-eight million, seven hundred thirty thousand, eight hundred ninety-four".