155390 has 16 divisors (see below), whose sum is σ = 287280. Its totient is φ = 60480.

The previous prime is 155387. The next prime is 155399. The reversal of 155390 is 93551.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221 + ... + 599.

It is an arithmetic number, because the mean of its divisors is an integer number (17955).

2¹⁵⁵³⁹⁰ is an apocalyptic number.

155390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155390 is a deficient number, since it is larger than the sum of its proper divisors (131890).

155390 is a wasteful number, since it uses less digits than its factorization.

155390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 155390 is about 394.1953830272. The cubic root of 155390 is about 53.7618686608.

It can be divided in two parts, 155 and 390, that added together give a palindrome (545).

The spelling of 155390 in words is "one hundred fifty-five thousand, three hundred ninety".