2402126440 has 128 divisors (see below), whose sum is σ = 6469632000. Its totient is φ = 784827648.

The previous prime is 2402126429. The next prime is 2402126449. The reversal of 2402126440 is 446212042.

It is a happy number.

It is a super-2 number, since 2×2402126440² = 11540422867494147200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2402126449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2311441 + ... + 2312479.

It is an arithmetic number, because the mean of its divisors is an integer number (50544000).

Almost surely, 2^2402126440 is an apocalyptic number.

2402126440 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 2402126440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3234816000).

2402126440 is an abundant number, since it is smaller than the sum of its proper divisors (4067505560).

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

2402126440 is a wasteful number, since it uses less digits than its factorization.

2402126440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 2402126440 is about 49011.4929378814. The cubic root of 2402126440 is about 1339.2612026065.

Adding to 2402126440 its reverse (446212042), we get a palindrome (2848338482).

The spelling of 2402126440 in words is "two billion, four hundred two million, one hundred twenty-six thousand, four hundred forty".