8155940 has 72 divisors (see below), whose sum is σ = 19676160. Its totient is φ = 2830464.

The previous prime is 8155913. The next prime is 8155943. The reversal of 8155940 is 495518.

It is a junction number, because it is equal to n+sod(n) for n = 8155897 and 8155906.

It is not an unprimeable number, because it can be changed into a prime (8155943) 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, 64157 + ... + 64283.

It is an arithmetic number, because the mean of its divisors is an integer number (273280).

Almost surely, 2^8155940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8155940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9838080).

8155940 is an abundant number, since it is smaller than the sum of its proper divisors (11520220).

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

8155940 is a wasteful number, since it uses less digits than its factorization.

8155940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 8155940 is about 2855.8606408577. The cubic root of 8155940 is about 201.2911467634.

The spelling of 8155940 in words is "eight million, one hundred fifty-five thousand, nine hundred forty".