2642240 has 56 divisors (see below), whose sum is σ = 6583680. Its totient is φ = 1008128.

The previous prime is 2642239. The next prime is 2642257. The reversal of 2642240 is 422462.

2642240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7181 + ... + 7539.

2^2642240 is an apocalyptic number.

2642240 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 2642240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3291840).

2642240 is an abundant number, since it is smaller than the sum of its proper divisors (3941440).

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

2642240 is a wasteful number, since it uses less digits than its factorization.

2642240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2642240 is about 1625.4968471209. The cubic root of 2642240 is about 138.2475428126.

It can be divided in two parts, 26422 and 40, that added together give a palindrome (26462).

The spelling of 2642240 in words is "two million, six hundred forty-two thousand, two hundred forty".