814042786 has 4 divisors (see below), whose sum is σ = 1221064182. Its totient is φ = 407021392.

The previous prime is 814042771. The next prime is 814042787. The reversal of 814042786 is 687240418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 687240418 = 2 ⋅343620209.

It can be written as a sum of positive squares in only one way, i.e., 459888025 + 354154761 = 21445^2 + 18819^2 .

It is not an unprimeable number, because it can be changed into a prime (814042787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203510695 + ... + 203510698.

Almost surely, 2^814042786 is an apocalyptic number.

814042786 is a deficient number, since it is larger than the sum of its proper divisors (407021396).

814042786 is a wasteful number, since it uses less digits than its factorization.

814042786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407021395.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 814042786 is about 28531.4350497832. The cubic root of 814042786 is about 933.7180276706.

The spelling of 814042786 in words is "eight hundred fourteen million, forty-two thousand, seven hundred eighty-six".