156165240 has 128 divisors (see below), whose sum is σ = 584133120. Its totient is φ = 32448000.

The previous prime is 156165227. The next prime is 156165241. The reversal of 156165240 is 42561651.

156165240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 156165198 and 156165207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156165241) 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, 790 + ... + 17690.

It is an arithmetic number, because the mean of its divisors is an integer number (4563540).

Almost surely, 2^156165240 is an apocalyptic number.

156165240 is a gapful number since it is divisible by the number (10) 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 156165240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292066560).

156165240 is an abundant number, since it is smaller than the sum of its proper divisors (427967880).

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

156165240 is a wasteful number, since it uses less digits than its factorization.

156165240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16933 (or 16929 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 156165240 is about 12496.6091400828. The cubic root of 156165240 is about 538.5112629538.

The spelling of 156165240 in words is "one hundred fifty-six million, one hundred sixty-five thousand, two hundred forty".