155480 has 48 divisors (see below), whose sum is σ = 395280. Its totient is φ = 54912.

The previous prime is 155473. The next prime is 155501. The reversal of 155480 is 84551.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

155480 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 11 ways as a sum of consecutive naturals, for example, 6749 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (8235).

2¹⁵⁵⁴⁸⁰ is an apocalyptic number.

155480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197640).

155480 is an abundant number, since it is smaller than the sum of its proper divisors (239800).

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

155480 is a wasteful number, since it uses less digits than its factorization.

155480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 155480 is about 394.3095230907. The cubic root of 155480 is about 53.7722460646.

The spelling of 155480 in words is "one hundred fifty-five thousand, four hundred eighty".