155549328 has 80 divisors (see below), whose sum is σ = 441495552. Its totient is φ = 46800000.

The previous prime is 155549321. The next prime is 155549357. The reversal of 155549328 is 823945551.

It is a self number, because there is not a number n which added to its sum of digits gives 155549328.

It is not an unprimeable number, because it can be changed into a prime (155549321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78753 + ... + 80703.

Almost surely, 2^155549328 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 155549328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220747776).

155549328 is an abundant number, since it is smaller than the sum of its proper divisors (285946224).

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

155549328 is a wasteful number, since it uses less digits than its factorization.

155549328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 2118 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The square root of 155549328 is about 12471.9416291129. The cubic root of 155549328 is about 537.8023716387.

The spelling of 155549328 in words is "one hundred fifty-five million, five hundred forty-nine thousand, three hundred twenty-eight".