28307794 has 16 divisors (see below), whose sum is σ = 44102520. Its totient is φ = 13616640.

The previous prime is 28307789. The next prime is 28307809. The reversal of 28307794 is 49770382.

It can be written as a sum of positive squares in 4 ways, for example, as 9272025 + 19035769 = 3045^2 + 4363^2 .

It is a super-2 number, since 2×28307794² = 1602662402292872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3622 + ... + 8350.

Almost surely, 2^28307794 is an apocalyptic number.

28307794 is a deficient number, since it is larger than the sum of its proper divisors (15794726).

28307794 is a wasteful number, since it uses less digits than its factorization.

28307794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 28307794 is about 5320.5069307351. The cubic root of 28307794 is about 304.7675161084.

The spelling of 28307794 in words is "twenty-eight million, three hundred seven thousand, seven hundred ninety-four".