155740 has 24 divisors (see below), whose sum is σ = 352800. Its totient is φ = 57408.

The previous prime is 155731. The next prime is 155741. The reversal of 155740 is 47551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (14700).

2¹⁵⁵⁷⁴⁰ is an apocalyptic number.

155740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155740 is an abundant number, since it is smaller than the sum of its proper divisors (197060).

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

155740 is a wasteful number, since it uses less digits than its factorization.

155740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 155740 is about 394.6390756121. The cubic root of 155740 is about 53.8022027539.

The spelling of 155740 in words is "one hundred fifty-five thousand, seven hundred forty".