155413728 has 120 divisors (see below), whose sum is σ = 484090992. Its totient is φ = 48743424.

The previous prime is 155413721. The next prime is 155413733. The reversal of 155413728 is 827314551.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 155413692 and 155413701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155413721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42301 + ... + 45827.

Almost surely, 2^155413728 is an apocalyptic number.

155413728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155413728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242045496).

155413728 is an abundant number, since it is smaller than the sum of its proper divisors (328677264).

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

155413728 is a wasteful number, since it uses less digits than its factorization.

155413728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3549 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 155413728 is about 12466.5042413661. The cubic root of 155413728 is about 537.6460499456.

It can be divided in two parts, 1554 and 13728, that multiplied together give a palindrome (21333312).

The spelling of 155413728 in words is "one hundred fifty-five million, four hundred thirteen thousand, seven hundred twenty-eight".