3086640 has 80 divisors (see below), whose sum is σ = 10639200. Its totient is φ = 822528.

The previous prime is 3086627. The next prime is 3086641. The reversal of 3086640 is 466803.

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

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3086641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446 + ... + 2874.

It is an arithmetic number, because the mean of its divisors is an integer number (132990).

Almost surely, 2^3086640 is an apocalyptic number.

3086640 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 3086640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5319600).

3086640 is an abundant number, since it is smaller than the sum of its proper divisors (7552560).

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

3086640 is a wasteful number, since it uses less digits than its factorization.

3086640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 3086640 is about 1756.8836045680. The cubic root of 3086640 is about 145.6002073016.

The spelling of 3086640 in words is "three million, eighty-six thousand, six hundred forty".