2442440 has 128 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 691200.

The previous prime is 2442437. The next prime is 2442457. The reversal of 2442440 is 442442.

2442440 = 53² + 54² + ... + 195².

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 31 ways as a sum of consecutive naturals, for example, 40010 + ... + 40070.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2^2442440 is an apocalyptic number.

2442440 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 2442440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3749760).

2442440 is an abundant number, since it is smaller than the sum of its proper divisors (5057080).

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

2442440 is a wasteful number, since it uses less digits than its factorization.

2442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 2442440 is about 1562.8307649902. The cubic root of 2442440 is about 134.6711704318.

Adding to 2442440 its reverse (442442), we get a palindrome (2884882).

It can be divided in two parts, 2442 and 440, that added together give a palindrome (2882).

The spelling of 2442440 in words is "two million, four hundred forty-two thousand, four hundred forty".