156442266 has 40 divisors (see below), whose sum is σ = 352160820. Its totient is φ = 51907392.

The previous prime is 156442259. The next prime is 156442267. The reversal of 156442266 is 662244651.

156442266 is a `hidden beast` number, since 1 + 5 + 644 + 2 + 2 + 6 + 6 = 666.

156442266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 122744241 + 33698025 = 11079^2 + 5805^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 156442266.

It is not an unprimeable number, because it can be changed into a prime (156442267) 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, 34990 + ... + 39206.

Almost surely, 2^156442266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156442266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176080410).

156442266 is an abundant number, since it is smaller than the sum of its proper divisors (195718554).

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

156442266 is a wasteful number, since it uses less digits than its factorization.

156442266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460 (or 4451 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 156442266 is about 12507.6882756167. The cubic root of 156442266 is about 538.8295017105.

The spelling of 156442266 in words is "one hundred fifty-six million, four hundred forty-two thousand, two hundred sixty-six".