156612820 has 144 divisors (see below), whose sum is σ = 434367360. Its totient is φ = 46884096.

The previous prime is 156612817. The next prime is 156612881. The reversal of 156612820 is 28216651.

156612820 is digitally balanced in base 2 and base 3, because in such bases 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 47 ways as a sum of consecutive naturals, for example, 241737 + ... + 242383.

It is an arithmetic number, because the mean of its divisors is an integer number (3016440).

Almost surely, 2^156612820 is an apocalyptic number.

156612820 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 156612820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217183680).

156612820 is an abundant number, since it is smaller than the sum of its proper divisors (277754540).

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

156612820 is a wasteful number, since it uses less digits than its factorization.

156612820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 156612820 is about 12514.5043849127. The cubic root of 156612820 is about 539.0252419730.

It can be divided in two parts, 15661 and 2820, that added together give a palindrome (18481).

The spelling of 156612820 in words is "one hundred fifty-six million, six hundred twelve thousand, eight hundred twenty".