861764 has 48 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 354816.

The previous prime is 861761. The next prime is 861797. The reversal of 861764 is 467168.

It is a self number, because there is not a number n which added to its sum of digits gives 861764.

It is not an unprimeable number, because it can be changed into a prime (861761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29702 + ... + 29730.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁸⁶¹⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

861764 is an abundant number, since it is smaller than the sum of its proper divisors (952636).

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

861764 is a wasteful number, since it uses less digits than its factorization.

861764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 90 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 861764 is about 928.3124474012. The cubic root of 861764 is about 95.1618294354.

The spelling of 861764 in words is "eight hundred sixty-one thousand, seven hundred sixty-four".