156985422 has 64 divisors (see below), whose sum is σ = 351571968. Its totient is φ = 46332000.

The previous prime is 156985379. The next prime is 156985447. The reversal of 156985422 is 224589651.

156985422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579147 + ... + 579417.

It is an arithmetic number, because the mean of its divisors is an integer number (5493312).

Almost surely, 2^156985422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156985422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175785984).

156985422 is an abundant number, since it is smaller than the sum of its proper divisors (194586546).

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

156985422 is a wasteful number, since it uses less digits than its factorization.

156985422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 172800, while the sum is 42.

The square root of 156985422 is about 12529.3823471071. The cubic root of 156985422 is about 539.4523734964.

The spelling of 156985422 in words is "one hundred fifty-six million, nine hundred eighty-five thousand, four hundred twenty-two".