155817328 has 40 divisors (see below), whose sum is σ = 318729600. Its totient is φ = 73589184.

The previous prime is 155817317. The next prime is 155817329. The reversal of 155817328 is 823718551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155817329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152403 + ... + 153421.

It is an arithmetic number, because the mean of its divisors is an integer number (7968240).

Almost surely, 2^155817328 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 155817328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159364800).

155817328 is an abundant number, since it is smaller than the sum of its proper divisors (162912272).

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

155817328 is a wasteful number, since it uses less digits than its factorization.

155817328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1543 counting only the distinct ones).

The product of its digits is 67200, while the sum is 40.

The square root of 155817328 is about 12482.6811222590. The cubic root of 155817328 is about 538.1110590090. Note that the first 3 decimals are identical.

The spelling of 155817328 in words is "one hundred fifty-five million, eight hundred seventeen thousand, three hundred twenty-eight".