156243340 has 48 divisors (see below), whose sum is σ = 359241120. Its totient is φ = 56609280.

The previous prime is 156243331. The next prime is 156243349. The reversal of 156243340 is 43342651.

It is an interprime number because it is at equal distance from previous prime (156243331) and next prime (156243349).

It is a junction number, because it is equal to n+sod(n) for n = 156243299 and 156243308.

It is not an unprimeable number, because it can be changed into a prime (156243349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67726 + ... + 69994.

It is an arithmetic number, because the mean of its divisors is an integer number (7484190).

Almost surely, 2^156243340 is an apocalyptic number.

156243340 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 156243340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179620560).

156243340 is an abundant number, since it is smaller than the sum of its proper divisors (202997780).

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

156243340 is a wasteful number, since it uses less digits than its factorization.

156243340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602 (or 2600 counting only the distinct ones).

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

The square root of 156243340 is about 12499.7335971612. The cubic root of 156243340 is about 538.6010198472.

Adding to 156243340 its reverse (43342651), we get a palindrome (199585991).

The spelling of 156243340 in words is "one hundred fifty-six million, two hundred forty-three thousand, three hundred forty".