380655 has 24 divisors (see below), whose sum is σ = 720720. Its totient is φ = 184320.

The previous prime is 380651. The next prime is 380657. The reversal of 380655 is 556083.

380655 = 56² + 57² + ... + 109².

380655 is a `hidden beast` number, since 3 + 8 + 0 + 655 = 666.

It is not a de Polignac number, because 380655 - 2² = 380651 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 380655.

It is not an unprimeable number, because it can be changed into a prime (380651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111 + ... + 879.

It is an arithmetic number, because the mean of its divisors is an integer number (30030).

2³⁸⁰⁶⁵⁵ is an apocalyptic number.

380655 is a deficient number, since it is larger than the sum of its proper divisors (340065).

380655 is a wasteful number, since it uses less digits than its factorization.

380655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 380655 is about 616.9724467105. The cubic root of 380655 is about 72.4731569274.

Subtracting from 380655 its sum of digits (27), we obtain a triangular number (380628 = T₈₇₂).

It can be divided in two parts, 380 and 655, that added together give a triangular number (1035 = T₄₅).

The spelling of 380655 in words is "three hundred eighty thousand, six hundred fifty-five".