361990 has 16 divisors (see below), whose sum is σ = 664848. Its totient is φ = 141856.

The previous prime is 361979. The next prime is 361993. The reversal of 361990 is 99163.

It is a happy number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361993) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 189 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (41553).

2³⁶¹⁹⁹⁰ is an apocalyptic number.

361990 is a deficient number, since it is larger than the sum of its proper divisors (302858).

361990 is a wasteful number, since it uses less digits than its factorization.

361990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 361990 is about 601.6560479211. The cubic root of 361990 is about 71.2687034104.

The spelling of 361990 in words is "three hundred sixty-one thousand, nine hundred ninety".