156440042 has 32 divisors (see below), whose sum is σ = 261563904. Its totient is φ = 69577200.

The previous prime is 156440041. The next prime is 156440057. The reversal of 156440042 is 240044651.

156440042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 156439993 and 156440020.

It is not an unprimeable number, because it can be changed into a prime (156440041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310763 + ... + 311265.

It is an arithmetic number, because the mean of its divisors is an integer number (8173872).

Almost surely, 2^156440042 is an apocalyptic number.

156440042 is a deficient number, since it is larger than the sum of its proper divisors (105123862).

156440042 is a wasteful number, since it uses less digits than its factorization.

156440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 156440042 is about 12507.5993699830. The cubic root of 156440042 is about 538.8269483458.

Adding to 156440042 its reverse (240044651), we get a palindrome (396484693).

The spelling of 156440042 in words is "one hundred fifty-six million, four hundred forty thousand, forty-two".