361918 has 4 divisors (see below), whose sum is σ = 542880. Its totient is φ = 180958.

The previous prime is 361909. The next prime is 361919. The reversal of 361918 is 819163.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361919) by changing a digit.

361918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90478 + ... + 90481.

It is an arithmetic number, because the mean of its divisors is an integer number (135720).

2³⁶¹⁹¹⁸ is an apocalyptic number.

361918 is a deficient number, since it is larger than the sum of its proper divisors (180962).

361918 is a wasteful number, since it uses less digits than its factorization.

361918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180961.

The product of its digits is 1296, while the sum is 28.

The square root of 361918 is about 601.5962100944. The cubic root of 361918 is about 71.2639779696.

The spelling of 361918 in words is "three hundred sixty-one thousand, nine hundred eighteen".