155144028 has 72 divisors (see below), whose sum is σ = 396044208. Its totient is φ = 47244288.

The previous prime is 155143909. The next prime is 155144051. The reversal of 155144028 is 820441551.

It is a junction number, because it is equal to n+sod(n) for n = 155143986 and 155144004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228826 + ... + 229502.

It is an arithmetic number, because the mean of its divisors is an integer number (5500614).

Almost surely, 2^155144028 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 155144028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198022104).

155144028 is an abundant number, since it is smaller than the sum of its proper divisors (240900180).

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

155144028 is a wasteful number, since it uses less digits than its factorization.

155144028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 155144028 is about 12455.6825585754. The cubic root of 155144028 is about 537.3348652980.

Adding to 155144028 its reverse (820441551), we get a palindrome (975585579).

The spelling of 155144028 in words is "one hundred fifty-five million, one hundred forty-four thousand, twenty-eight".