866738 has 4 divisors (see below), whose sum is σ = 1300110. Its totient is φ = 433368.

The previous prime is 866737. The next prime is 866743. The reversal of 866738 is 837668.

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., 727609 + 139129 = 853^2 + 373^2 .

It is not an unprimeable number, because it can be changed into a prime (866737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216683 + ... + 216686.

2⁸⁶⁶⁷³⁸ is an apocalyptic number.

866738 is a deficient number, since it is larger than the sum of its proper divisors (433372).

866738 is a wasteful number, since it uses less digits than its factorization.

866738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433371.

The product of its digits is 48384, while the sum is 38.

The square root of 866738 is about 930.9876476087. The cubic root of 866738 is about 95.3445659196.

The spelling of 866738 in words is "eight hundred sixty-six thousand, seven hundred thirty-eight".