8145240 has 64 divisors (see below), whose sum is σ = 24710400. Its totient is φ = 2147712.

The previous prime is 8145239. The next prime is 8145253. The reversal of 8145240 is 425418.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 8145240.

It is a congruent number.

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, 12031 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (386100).

Almost surely, 2^8145240 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 8145240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12355200).

8145240 is an abundant number, since it is smaller than the sum of its proper divisors (16565160).

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

8145240 is a wasteful number, since it uses less digits than its factorization.

8145240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 8145240 is about 2853.9866853228. The cubic root of 8145240 is about 201.2030817931.

It can be divided in two parts, 8145 and 240, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 8145240 in words is "eight million, one hundred forty-five thousand, two hundred forty".