156420330 has 96 divisors (see below), whose sum is σ = 423105984. Its totient is φ = 36960000.

The previous prime is 156420317. The next prime is 156420337. The reversal of 156420330 is 33024651.

It is a happy number.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 156420330.

It is not an unprimeable number, because it can be changed into a prime (156420337) 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 47 ways as a sum of consecutive naturals, for example, 148305 + ... + 149355.

It is an arithmetic number, because the mean of its divisors is an integer number (4407354).

Almost surely, 2^156420330 is an apocalyptic number.

156420330 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 156420330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211552992).

156420330 is an abundant number, since it is smaller than the sum of its proper divisors (266685654).

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

156420330 is a wasteful number, since it uses less digits than its factorization.

156420330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 156420330 is about 12506.8113442236. The cubic root of 156420330 is about 538.8043160265.

Adding to 156420330 its reverse (33024651), we get a palindrome (189444981).

The spelling of 156420330 in words is "one hundred fifty-six million, four hundred twenty thousand, three hundred thirty".