156440027 has 4 divisors (see below), whose sum is σ = 157035120. Its totient is φ = 155844936.

The previous prime is 156439999. The next prime is 156440029. The reversal of 156440027 is 720044651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 156440027 - 2¹² = 156435931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156440029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297152 + ... + 297677.

It is an arithmetic number, because the mean of its divisors is an integer number (39258780).

Almost surely, 2^156440027 is an apocalyptic number.

156440027 is a deficient number, since it is larger than the sum of its proper divisors (595093).

156440027 is an equidigital number, since it uses as much as digits as its factorization.

156440027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595092.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 156440027 is about 12507.5987703476. The cubic root of 156440027 is about 538.8269311243.

Adding to 156440027 its reverse (720044651), we get a palindrome (876484678).

The spelling of 156440027 in words is "one hundred fifty-six million, four hundred forty thousand, twenty-seven".