361840 has 20 divisors (see below), whose sum is σ = 841464. Its totient is φ = 144704.

The previous prime is 361807. The next prime is 361843. The reversal of 361840 is 48163.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361843) by changing a digit.

361840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182 + ... + 2341.

2³⁶¹⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

361840 is an abundant number, since it is smaller than the sum of its proper divisors (479624).

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

361840 is a wasteful number, since it uses less digits than its factorization.

361840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536 (or 4530 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 361840 is about 601.5313790651. The cubic root of 361840 is about 71.2588580348.

The spelling of 361840 in words is "three hundred sixty-one thousand, eight hundred forty".