156342340 has 72 divisors (see below), whose sum is σ = 416670912. Its totient is φ = 48726720.

The previous prime is 156342287. The next prime is 156342341. The reversal of 156342340 is 43243651.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 156342299 and 156342308.

It is not an unprimeable number, because it can be changed into a prime (156342341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3529 + ... + 18031.

It is an arithmetic number, because the mean of its divisors is an integer number (5787096).

Almost surely, 2^156342340 is an apocalyptic number.

156342340 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 156342340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208335456).

156342340 is an abundant number, since it is smaller than the sum of its proper divisors (260328572).

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

156342340 is a wasteful number, since it uses less digits than its factorization.

156342340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14537 (or 14528 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 156342340 is about 12503.6930544540. The cubic root of 156342340 is about 538.7147532133.

Adding to 156342340 its reverse (43243651), we get a palindrome (199585991).

The spelling of 156342340 in words is "one hundred fifty-six million, three hundred forty-two thousand, three hundred forty".