155920128 has 288 divisors, whose sum is σ = 538438656. Its totient is φ = 38928384.

The previous prime is 155920123. The next prime is 155920129. The reversal of 155920128 is 821029551.

It is a super-2 number, since 2×155920128² = 48622172631072768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155920123) 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, 1607376 + ... + 1607472.

Almost surely, 2^155920128 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 155920128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269219328).

155920128 is an abundant number, since it is smaller than the sum of its proper divisors (382518528).

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

155920128 is a wasteful number, since it uses less digits than its factorization.

155920128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 155920128 is about 12486.7981484446. The cubic root of 155920128 is about 538.2293720293.

Adding to 155920128 its reverse (821029551), we get a palindrome (976949679).

The spelling of 155920128 in words is "one hundred fifty-five million, nine hundred twenty thousand, one hundred twenty-eight".