2662440 has 64 divisors (see below), whose sum is σ = 8717760. Its totient is φ = 645120.

The previous prime is 2662399. The next prime is 2662453. The reversal of 2662440 is 442662.

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 2662440.

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, 312 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (136215).

2^2662440 is an apocalyptic number.

2662440 is a gapful number since it is divisible by the number (20) 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 2662440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4358880).

2662440 is an abundant number, since it is smaller than the sum of its proper divisors (6055320).

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

2662440 is a wasteful number, since it uses less digits than its factorization.

2662440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2662440 is about 1631.6985015621. The cubic root of 2662440 is about 138.5989509529.

The spelling of 2662440 in words is "two million, six hundred sixty-two thousand, four hundred forty".