8171940 has 48 divisors (see below), whose sum is σ = 26151552. Its totient is φ = 1867776.

The previous prime is 8171929. The next prime is 8171953. The reversal of 8171940 is 491718.

8171940 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8171898 and 8171907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9309 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (544824).

Almost surely, 2^8171940 is an apocalyptic number.

It is an amenable number.

8171940 is an abundant number, since it is smaller than the sum of its proper divisors (17979612).

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

8171940 is a wasteful number, since it uses less digits than its factorization.

8171940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19476 (or 19474 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 8171940 is about 2858.6605254909. The cubic root of 8171940 is about 201.4226891152.

The spelling of 8171940 in words is "eight million, one hundred seventy-one thousand, nine hundred forty".