2421401240 has 64 divisors (see below), whose sum is σ = 5548046400. Its totient is φ = 950925312.

The previous prime is 2421401221. The next prime is 2421401261. The reversal of 2421401240 is 421041242.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678581 + ... + 682139.

It is an arithmetic number, because the mean of its divisors is an integer number (86688225).

Almost surely, 2^2421401240 is an apocalyptic number.

2421401240 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 2421401240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2774023200).

2421401240 is an abundant number, since it is smaller than the sum of its proper divisors (3126645160).

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

2421401240 is a wasteful number, since it uses less digits than its factorization.

2421401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2421401240 is about 49207.7355707413. The cubic root of 2421401240 is about 1342.8337669302.

Adding to 2421401240 its reverse (421041242), we get a palindrome (2842442482).

The spelling of 2421401240 in words is "two billion, four hundred twenty-one million, four hundred one thousand, two hundred forty".