2400440 has 32 divisors (see below), whose sum is σ = 6173280. Its totient is φ = 822912.

The previous prime is 2400413. The next prime is 2400469. The reversal of 2400440 is 440042.

It is a super-2 number, since 2×2400440² = 11524224387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

2400440 is a modest number, since divided by 440 gives 240 as remainder.

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, 4007 + ... + 4566.

It is an arithmetic number, because the mean of its divisors is an integer number (192915).

2^2400440 is an apocalyptic number.

2400440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2400440 is an abundant number, since it is smaller than the sum of its proper divisors (3772840).

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

2400440 is a wasteful number, since it uses less digits than its factorization.

2400440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591 (or 8587 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2400440 is about 1549.3353413642. The cubic root of 2400440 is about 133.8947714748.

Adding to 2400440 its reverse (440042), we get a palindrome (2840482).

The spelling of 2400440 in words is "two million, four hundred thousand, four hundred forty".