28540294 has 4 divisors (see below), whose sum is σ = 42810444. Its totient is φ = 14270146.

The previous prime is 28540249. The next prime is 28540301. The reversal of 28540294 is 49204582.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 7135072 + ... + 7135075.

It is an arithmetic number, because the mean of its divisors is an integer number (10702611).

Almost surely, 2^28540294 is an apocalyptic number.

28540294 is a deficient number, since it is larger than the sum of its proper divisors (14270150).

28540294 is a wasteful number, since it uses less digits than its factorization.

28540294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14270149.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28540294 is about 5342.3116719263. The cubic root of 28540294 is about 305.5996230339.

The spelling of 28540294 in words is "twenty-eight million, five hundred forty thousand, two hundred ninety-four".