3018640 has 40 divisors (see below), whose sum is σ = 7108920. Its totient is φ = 1191936.

The previous prime is 3018637. The next prime is 3018647. The reversal of 3018640 is 468103.

It can be written as a sum of positive squares in 4 ways, for example, as 73984 + 2944656 = 272^2 + 1716^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×3018640² = 18224374899200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3018647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7566 + ... + 7954.

It is an arithmetic number, because the mean of its divisors is an integer number (177723).

Almost surely, 2^3018640 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 3018640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3554460).

3018640 is an abundant number, since it is smaller than the sum of its proper divisors (4090280).

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

3018640 is a wasteful number, since it uses less digits than its factorization.

3018640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 3018640 is about 1737.4233796056. The cubic root of 3018640 is about 144.5230464153.

The spelling of 3018640 in words is "three million, eighteen thousand, six hundred forty".