8625840 has 80 divisors (see below), whose sum is σ = 27045888. Its totient is φ = 2274048.

The previous prime is 8625833. The next prime is 8625853. The reversal of 8625840 is 485268.

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

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30339 + ... + 30621.

Almost surely, 2^8625840 is an apocalyptic number.

8625840 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 8625840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13522944).

8625840 is an abundant number, since it is smaller than the sum of its proper divisors (18420048).

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

8625840 is a wasteful number, since it uses less digits than its factorization.

8625840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 8625840 is about 2936.9780387330. The cubic root of 8625840 is about 205.0849538833.

The spelling of 8625840 in words is "eight million, six hundred twenty-five thousand, eight hundred forty".