28782814 has 4 divisors (see below), whose sum is σ = 43174224. Its totient is φ = 14391406.

The previous prime is 28782811. The next prime is 28782827. The reversal of 28782814 is 41828782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41828782 = 2 ⋅20914391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7195702 + ... + 7195705.

It is an arithmetic number, because the mean of its divisors is an integer number (10793556).

Almost surely, 2^28782814 is an apocalyptic number.

28782814 is a deficient number, since it is larger than the sum of its proper divisors (14391410).

28782814 is a wasteful number, since it uses less digits than its factorization.

28782814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14391409.

The product of its digits is 57344, while the sum is 40.

The square root of 28782814 is about 5364.9616960422. The cubic root of 28782814 is about 306.4627895574.

The spelling of 28782814 in words is "twenty-eight million, seven hundred eighty-two thousand, eight hundred fourteen".