28517494 has 8 divisors (see below), whose sum is σ = 42979608. Its totient is φ = 14190960.

The previous prime is 28517479. The next prime is 28517519. The reversal of 28517494 is 49471582.

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

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, 33367 + ... + 34210.

It is an arithmetic number, because the mean of its divisors is an integer number (5372451).

Almost surely, 2^28517494 is an apocalyptic number.

28517494 is a deficient number, since it is larger than the sum of its proper divisors (14462114).

28517494 is a wasteful number, since it uses less digits than its factorization.

28517494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67790.

The product of its digits is 80640, while the sum is 40.

The square root of 28517494 is about 5340.1773378793. The cubic root of 28517494 is about 305.5182231757.

The spelling of 28517494 in words is "twenty-eight million, five hundred seventeen thousand, four hundred ninety-four".