814889642 has 16 divisors (see below), whose sum is σ = 1406332800. Its totient is φ = 346893648.

The previous prime is 814889641. The next prime is 814889659. The reversal of 814889642 is 246988418.

It is not an unprimeable number, because it can be changed into a prime (814889641) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 193238 + ... + 197409.

It is an arithmetic number, because the mean of its divisors is an integer number (87895800).

Almost surely, 2^814889642 is an apocalyptic number.

814889642 is a deficient number, since it is larger than the sum of its proper divisors (591443158).

814889642 is a wasteful number, since it uses less digits than its factorization.

814889642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390805.

The product of its digits is 884736, while the sum is 50.

The square root of 814889642 is about 28546.2719457375. The cubic root of 814889642 is about 934.0417005318.

The spelling of 814889642 in words is "eight hundred fourteen million, eight hundred eighty-nine thousand, six hundred forty-two".