155280 has 40 divisors (see below), whose sum is σ = 482112. Its totient is φ = 41344.

The previous prime is 155269. The next prime is 155291. The reversal of 155280 is 82551.

It is an interprime number because it is at equal distance from previous prime (155269) and next prime (155291).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×155280² = 48223756800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 563.

2¹⁵⁵²⁸⁰ is an apocalyptic number.

155280 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 155280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241056).

155280 is an abundant number, since it is smaller than the sum of its proper divisors (326832).

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

155280 is a wasteful number, since it uses less digits than its factorization.

155280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 155280 is about 394.0558336074. The cubic root of 155280 is about 53.7491797243.

It can be divided in two parts, 155 and 280, that added together give a triangular number (435 = T₂₉).

The spelling of 155280 in words is "one hundred fifty-five thousand, two hundred eighty".