28815746 has 4 divisors (see below), whose sum is σ = 43223622. Its totient is φ = 14407872.

The previous prime is 28815737. The next prime is 28815767. The reversal of 28815746 is 64751882.

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

It can be written as a sum of positive squares in only one way, i.e., 25110121 + 3705625 = 5011^2 + 1925^2 .

It is a Curzon 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, 7203935 + ... + 7203938.

Almost surely, 2^28815746 is an apocalyptic number.

28815746 is a deficient number, since it is larger than the sum of its proper divisors (14407876).

28815746 is a wasteful number, since it uses less digits than its factorization.

28815746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14407875.

The product of its digits is 107520, while the sum is 41.

The square root of 28815746 is about 5368.0299924646. The cubic root of 28815746 is about 306.5796253184.

The spelling of 28815746 in words is "twenty-eight million, eight hundred fifteen thousand, seven hundred forty-six".