155805480 has 48 divisors (see below), whose sum is σ = 506368980. Its totient is φ = 41548032.

The previous prime is 155805451. The next prime is 155805539. The reversal of 155805480 is 84508551.

It can be written as a sum of positive squares in 2 ways, for example, as 141562404 + 14243076 = 11898^2 + 3774^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216037 + ... + 216756.

Almost surely, 2^155805480 is an apocalyptic number.

155805480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155805480 is an abundant number, since it is smaller than the sum of its proper divisors (350563500).

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

155805480 is a wasteful number, since it uses less digits than its factorization.

155805480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432810 (or 432803 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 155805480 is about 12482.2065357051. The cubic root of 155805480 is about 538.0974197441.

The spelling of 155805480 in words is "one hundred fifty-five million, eight hundred five thousand, four hundred eighty".