8243625840 has 80 divisors (see below), whose sum is σ = 26436477600. Its totient is φ = 2122494976.

The previous prime is 8243625829. The next prime is 8243625851. The reversal of 8243625840 is 485263428.

It is an interprime number because it is at equal distance from previous prime (8243625829) and next prime (8243625851).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 8243625792 and 8243625801.

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, 585255 + ... + 599174.

It is an arithmetic number, because the mean of its divisors is an integer number (330455970).

Almost surely, 2^8243625840 is an apocalyptic number.

8243625840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8243625840 is an abundant number, since it is smaller than the sum of its proper divisors (18192851760).

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

8243625840 is a wasteful number, since it uses less digits than its factorization.

8243625840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184474 (or 1184468 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The square root of 8243625840 is about 90794.4152467540. The cubic root of 8243625840 is about 2020.0994820790.

The spelling of 8243625840 in words is "eight billion, two hundred forty-three million, six hundred twenty-five thousand, eight hundred forty".