868402 has 4 divisors (see below), whose sum is σ = 1302606. Its totient is φ = 434200.

The previous prime is 868397. The next prime is 868409. The reversal of 868402 is 204868.

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., 657721 + 210681 = 811^2 + 459^2 .

It is not an unprimeable number, because it can be changed into a prime (868409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217099 + ... + 217102.

2⁸⁶⁸⁴⁰² is an apocalyptic number.

868402 is a deficient number, since it is larger than the sum of its proper divisors (434204).

868402 is a wasteful number, since it uses less digits than its factorization.

868402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434203.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 868402 is about 931.8808936769. The cubic root of 868402 is about 95.4055424147.

The spelling of 868402 in words is "eight hundred sixty-eight thousand, four hundred two".