861308 has 24 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 349488.

The previous prime is 861299. The next prime is 861317. The reversal of 861308 is 803168.

861308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (861299) and next prime (861317).

It is a congruent number.

It is an unprimeable number.

861308 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2⁸⁶¹³⁰⁸ is an apocalyptic number.

It is an amenable number.

861308 is an abundant number, since it is smaller than the sum of its proper divisors (953092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861308 is a wasteful number, since it uses less digits than its factorization.

861308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 861308 is about 928.0668079400. The cubic root of 861308 is about 95.1450416024.

It can be divided in two parts, 8 and 61308, that added together give a palindrome (61316).

The spelling of 861308 in words is "eight hundred sixty-one thousand, three hundred eight".