8146640 has 20 divisors (see below), whose sum is σ = 18941124. Its totient is φ = 3258624.

The previous prime is 8146639. The next prime is 8146657. The reversal of 8146640 is 466418.

It can be written as a sum of positive squares in 2 ways, for example, as 4963984 + 3182656 = 2228^2 + 1784^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50837 + ... + 50996.

Almost surely, 2^8146640 is an apocalyptic number.

8146640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8146640 is an abundant number, since it is smaller than the sum of its proper divisors (10794484).

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

8146640 is a wasteful number, since it uses less digits than its factorization.

8146640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101846 (or 101840 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8146640 is about 2854.2319457255. The cubic root of 8146640 is about 201.2146086962.

The spelling of 8146640 in words is "eight million, one hundred forty-six thousand, six hundred forty".