3143640 has 128 divisors (see below), whose sum is σ = 10575360. Its totient is φ = 743424.

The previous prime is 3143587. The next prime is 3143641. The reversal of 3143640 is 463413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3143641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46887 + ... + 46953.

It is an arithmetic number, because the mean of its divisors is an integer number (82620).

Almost surely, 2^3143640 is an apocalyptic number.

3143640 is a gapful number since it is divisible by the number (30) 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 3143640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5287680).

3143640 is an abundant number, since it is smaller than the sum of its proper divisors (7431720).

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

3143640 is a wasteful number, since it uses less digits than its factorization.

3143640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 3143640 is about 1773.0313026002. The cubic root of 3143640 is about 146.4909972064.

The spelling of 3143640 in words is "three million, one hundred forty-three thousand, six hundred forty".