7143640 has 64 divisors (see below), whose sum is σ = 18984960. Its totient is φ = 2367360.

The previous prime is 7143637. The next prime is 7143667. The reversal of 7143640 is 463417.

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, 8269 + ... + 9091.

It is an arithmetic number, because the mean of its divisors is an integer number (296640).

Almost surely, 2^7143640 is an apocalyptic number.

7143640 is a gapful number since it is divisible by the number (70) 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 7143640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9492480).

7143640 is an abundant number, since it is smaller than the sum of its proper divisors (11841320).

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

7143640 is a wasteful number, since it uses less digits than its factorization.

7143640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 7143640 is about 2672.7588742721. The cubic root of 7143640 is about 192.5927140952.

The spelling of 7143640 in words is "seven million, one hundred forty-three thousand, six hundred forty".