361864 has 8 divisors (see below), whose sum is σ = 678510. Its totient is φ = 180928.

The previous prime is 361843. The next prime is 361871. The reversal of 361864 is 468163.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 152100 = 458^2 + 390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 22609 + ... + 22624.

2³⁶¹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

361864 is a deficient number, since it is larger than the sum of its proper divisors (316646).

361864 is a wasteful number, since it uses less digits than its factorization.

361864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45239 (or 45235 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 361864 is about 601.5513278183. The cubic root of 361864 is about 71.2604334777.

It can be divided in two parts, 361 and 864, that added together give a triangular number (1225 = T₄₉).

The spelling of 361864 in words is "three hundred sixty-one thousand, eight hundred sixty-four".