861301764 has 18 divisors (see below), whose sum is σ = 2177179550. Its totient is φ = 287100576.

The previous prime is 861301733. The next prime is 861301807. The reversal of 861301764 is 467103168.

It can be written as a sum of positive squares in only one way, i.e., 635040000 + 226261764 = 25200^2 + 15042^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 23925049 = 861301764 / (8 + 6 + 1 + 3 + 0 + 1 + 7 + 6 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11962489 + ... + 11962560.

Almost surely, 2^861301764 is an apocalyptic number.

It is an amenable number.

861301764 is an abundant number, since it is smaller than the sum of its proper divisors (1315877786).

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

861301764 is a wasteful number, since it uses less digits than its factorization.

861301764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23925059 (or 23925054 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 861301764 is about 29347.9430965783. The cubic root of 861301764 is about 951.4481198035.

The spelling of 861301764 in words is "eight hundred sixty-one million, three hundred one thousand, seven hundred sixty-four".