361780 has 12 divisors (see below), whose sum is σ = 759780. Its totient is φ = 144704.

The previous prime is 361769. The next prime is 361787. The reversal of 361780 is 87163.

361780 = T₁₁₄ + T₁₁₅ + ... + T₁₅₃.

It can be written as a sum of positive squares in 2 ways, for example, as 242064 + 119716 = 492^2 + 346^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9025 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (63315).

2³⁶¹⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

361780 is an abundant number, since it is smaller than the sum of its proper divisors (398000).

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

361780 is a wasteful number, since it uses less digits than its factorization.

361780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18098 (or 18096 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 361780 is about 601.4815042875. The cubic root of 361780 is about 71.2549191228.

The spelling of 361780 in words is "three hundred sixty-one thousand, seven hundred eighty".