156985442 has 8 divisors (see below), whose sum is σ = 245716416. Its totient is φ = 75079972.

The previous prime is 156985379. The next prime is 156985447. The reversal of 156985442 is 244589651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 156985393 and 156985402.

It is not an unprimeable number, because it can be changed into a prime (156985447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706318 + ... + 1706409.

It is an arithmetic number, because the mean of its divisors is an integer number (30714552).

Almost surely, 2^156985442 is an apocalyptic number.

156985442 is a deficient number, since it is larger than the sum of its proper divisors (88730974).

156985442 is a wasteful number, since it uses less digits than its factorization.

156985442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412752.

The product of its digits is 345600, while the sum is 44.

The square root of 156985442 is about 12529.3831452311. The cubic root of 156985442 is about 539.4523964052.

The spelling of 156985442 in words is "one hundred fifty-six million, nine hundred eighty-five thousand, four hundred forty-two".