8237640 has 64 divisors (see below), whose sum is σ = 26020800. Its totient is φ = 2080512.

The previous prime is 8237629. The next prime is 8237681. The reversal of 8237640 is 467328.

8237640 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 = 8237598 and 8237607.

It is a congruent number.

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, 474 + ... + 4086.

It is an arithmetic number, because the mean of its divisors is an integer number (406575).

Almost surely, 2^8237640 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 8237640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13010400).

8237640 is an abundant number, since it is smaller than the sum of its proper divisors (17783160).

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

8237640 is a wasteful number, since it uses less digits than its factorization.

8237640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 8237640 is about 2870.1289169652. The cubic root of 8237640 is about 201.9610420573.

The spelling of 8237640 in words is "eight million, two hundred thirty-seven thousand, six hundred forty".