155540304 has 120 divisors (see below), whose sum is σ = 460595520. Its totient is φ = 50253696.

The previous prime is 155540269. The next prime is 155540317. The reversal of 155540304 is 403045551.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 591277 + ... + 591539.

It is an arithmetic number, because the mean of its divisors is an integer number (3838296).

Almost surely, 2^155540304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155540304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230297760).

155540304 is an abundant number, since it is smaller than the sum of its proper divisors (305055216).

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

155540304 is a wasteful number, since it uses less digits than its factorization.

155540304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 155540304 is about 12471.5798518071. The cubic root of 155540304 is about 537.7919714599.

Adding to 155540304 its reverse (403045551), we get a palindrome (558585855).

The spelling of 155540304 in words is "one hundred fifty-five million, five hundred forty thousand, three hundred four".