155585340 has 96 divisors (see below), whose sum is σ = 505128960. Its totient is φ = 39682368.

The previous prime is 155585327. The next prime is 155585347. The reversal of 155585340 is 43585551.

It is a happy number.

155585340 is a `hidden beast` number, since 15 + 558 + 53 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 155585295 and 155585304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155585347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6157 + ... + 18683.

It is an arithmetic number, because the mean of its divisors is an integer number (5261760).

Almost surely, 2^155585340 is an apocalyptic number.

155585340 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 155585340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252564480).

155585340 is an abundant number, since it is smaller than the sum of its proper divisors (349543620).

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

155585340 is a wasteful number, since it uses less digits than its factorization.

155585340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12568 (or 12560 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 155585340 is about 12473.3852662379. The cubic root of 155585340 is about 537.8438715385.

The spelling of 155585340 in words is "one hundred fifty-five million, five hundred eighty-five thousand, three hundred forty".