156820000 has 60 divisors (see below), whose sum is σ = 385849926. Its totient is φ = 62720000.

The previous prime is 156819989. The next prime is 156820021. The reversal of 156820000 is 28651.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 169744 + 156650256 = 412^2 + 12516^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16080 + ... + 23920.

Almost surely, 2^156820000 is an apocalyptic number.

156820000 is a gapful number since it is divisible by the number (10) 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 156820000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192924963).

156820000 is an abundant number, since it is smaller than the sum of its proper divisors (229029926).

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

156820000 is an frugal number, since it uses more digits than its factorization.

156820000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7871 (or 7848 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 156820000 is about 12522.7792442413. The cubic root of 156820000 is about 539.2628258470.

Adding to 156820000 its reverse (28651), we get a palindrome (156848651).

It can be divided in two parts, 1568 and 20000, that multiplied together give a square (31360000 = 5600²).

The spelling of 156820000 in words is "one hundred fifty-six million, eight hundred twenty thousand".