155747872 has 72 divisors (see below), whose sum is σ = 361972800. Its totient is φ = 65761920.

The previous prime is 155747869. The next prime is 155747929. The reversal of 155747872 is 278747551.

155747872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×155747872³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110629 + ... + 112027.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^155747872 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 155747872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180986400).

155747872 is an abundant number, since it is smaller than the sum of its proper divisors (206224928).

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

155747872 is a wasteful number, since it uses less digits than its factorization.

155747872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1479 counting only the distinct ones).

The product of its digits is 548800, while the sum is 46.

The square root of 155747872 is about 12479.8987175377. The cubic root of 155747872 is about 538.0310923007.

The spelling of 155747872 in words is "one hundred fifty-five million, seven hundred forty-seven thousand, eight hundred seventy-two".