28293494 has 4 divisors (see below), whose sum is σ = 42440244. Its totient is φ = 14146746.

The previous prime is 28293479. The next prime is 28293521. The reversal of 28293494 is 49439282.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7073372 + ... + 7073375.

It is an arithmetic number, because the mean of its divisors is an integer number (10610061).

Almost surely, 2^28293494 is an apocalyptic number.

28293494 is a deficient number, since it is larger than the sum of its proper divisors (14146750).

28293494 is a wasteful number, since it uses less digits than its factorization.

28293494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14146749.

The product of its digits is 124416, while the sum is 41.

The square root of 28293494 is about 5319.1629040668. The cubic root of 28293494 is about 304.7161885536.

The spelling of 28293494 in words is "twenty-eight million, two hundred ninety-three thousand, four hundred ninety-four".