157785856 has 36 divisors (see below), whose sum is σ = 319428144. Its totient is φ = 77772800.

The previous prime is 157785853. The next prime is 157785863. The reversal of 157785856 is 658587751.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157785853) 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, 13836 + ... + 22516.

It is an arithmetic number, because the mean of its divisors is an integer number (8873004).

Almost surely, 2^157785856 is an apocalyptic number.

157785856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157785856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159714072).

157785856 is an abundant number, since it is smaller than the sum of its proper divisors (161642288).

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

157785856 is an frugal number, since it uses more digits than its factorization.

157785856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768 (or 8754 counting only the distinct ones).

The product of its digits is 2352000, while the sum is 52.

The square root of 157785856 is about 12561.2840108008. The cubic root of 157785856 is about 540.3676691332.

The spelling of 157785856 in words is "one hundred fifty-seven million, seven hundred eighty-five thousand, eight hundred fifty-six".