156339820 has 192 divisors, whose sum is σ = 444358656. Its totient is φ = 44789760.

The previous prime is 156339811. The next prime is 156339829. The reversal of 156339820 is 28933651.

It is an interprime number because it is at equal distance from previous prime (156339811) and next prime (156339829).

It is a self number, because there is not a number n which added to its sum of digits gives 156339820.

It is not an unprimeable number, because it can be changed into a prime (156339829) 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 63 ways as a sum of consecutive naturals, for example, 959059 + ... + 959221.

It is an arithmetic number, because the mean of its divisors is an integer number (2314368).

Almost surely, 2^156339820 is an apocalyptic number.

156339820 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 156339820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222179328).

156339820 is an abundant number, since it is smaller than the sum of its proper divisors (288018836).

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

156339820 is a wasteful number, since it uses less digits than its factorization.

156339820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 156339820 is about 12503.5922838199. The cubic root of 156339820 is about 538.7118587777.

The spelling of 156339820 in words is "one hundred fifty-six million, three hundred thirty-nine thousand, eight hundred twenty".