155782 has 16 divisors (see below), whose sum is σ = 261072. Its totient is φ = 69120.

The previous prime is 155777. The next prime is 155783. The reversal of 155782 is 287551.

It is a self number, because there is not a number n which added to its sum of digits gives 155782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155783) by changing a digit.

155782 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 7 ways as a sum of consecutive naturals, for example, 1558 + ... + 1654.

It is an arithmetic number, because the mean of its divisors is an integer number (16317).

2¹⁵⁵⁷⁸² is an apocalyptic number.

155782 is a deficient number, since it is larger than the sum of its proper divisors (105290).

155782 is a wasteful number, since it uses less digits than its factorization.

155782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183.

The product of its digits is 2800, while the sum is 28.

The square root of 155782 is about 394.6922852046. The cubic root of 155782 is about 53.8070387828.

Subtracting 155782 from its reverse (287551), we obtain a square (131769 = 363²).

The spelling of 155782 in words is "one hundred fifty-five thousand, seven hundred eighty-two".