865943402 has 4 divisors (see below), whose sum is σ = 1298915106. Its totient is φ = 432971700.

The previous prime is 865943383. The next prime is 865943423. The reversal of 865943402 is 204349568.

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., 780029041 + 85914361 = 27929^2 + 9269^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 865943402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216485849 + ... + 216485852.

Almost surely, 2^865943402 is an apocalyptic number.

865943402 is a deficient number, since it is larger than the sum of its proper divisors (432971704).

865943402 is a wasteful number, since it uses less digits than its factorization.

865943402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432971703.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 865943402 is about 29426.9162842456. The cubic root of 865943402 is about 953.1542071666.

The spelling of 865943402 in words is "eight hundred sixty-five million, nine hundred forty-three thousand, four hundred two".