156985770 has 64 divisors (see below), whose sum is σ = 386386560. Its totient is φ = 40808448.

The previous prime is 156985723. The next prime is 156985813. The reversal of 156985770 is 77589651.

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, 212061 + ... + 212799.

It is an arithmetic number, because the mean of its divisors is an integer number (6037290).

Almost surely, 2^156985770 is an apocalyptic number.

156985770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 156985770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193193280).

156985770 is an abundant number, since it is smaller than the sum of its proper divisors (229400790).

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

156985770 is a wasteful number, since it uses less digits than its factorization.

156985770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its (nonzero) digits is 529200, while the sum is 48.

The square root of 156985770 is about 12529.3962344560. The cubic root of 156985770 is about 539.4527721094.

The spelling of 156985770 in words is "one hundred fifty-six million, nine hundred eighty-five thousand, seven hundred seventy".