8371840 has 64 divisors (see below), whose sum is σ = 20367360. Its totient is φ = 3290112.

The previous prime is 8371819. The next prime is 8371861. The reversal of 8371840 is 481738.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8371819) and next prime (8371861).

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65857 + ... + 65983.

It is an arithmetic number, because the mean of its divisors is an integer number (318240).

Almost surely, 2^8371840 is an apocalyptic number.

8371840 is a gapful number since it is divisible by the number (80) 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 8371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10183680).

8371840 is an abundant number, since it is smaller than the sum of its proper divisors (11995520).

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

8371840 is a wasteful number, since it uses less digits than its factorization.

8371840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8371840 is about 2893.4132093429. The cubic root of 8371840 is about 203.0518605316.

The spelling of 8371840 in words is "eight million, three hundred seventy-one thousand, eight hundred forty".