2620401420 has 576 divisors, whose sum is σ = 10086975360. Its totient is φ = 501645312.

The previous prime is 2620401391. The next prime is 2620401439. The reversal of 2620401420 is 241040262.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 24040326 + ... + 24040434.

It is an arithmetic number, because the mean of its divisors is an integer number (17512110).

Almost surely, 2^2620401420 is an apocalyptic number.

2620401420 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 2620401420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5043487680).

2620401420 is an abundant number, since it is smaller than the sum of its proper divisors (7466573940).

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

2620401420 is a wasteful number, since it uses less digits than its factorization.

2620401420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2620401420 is about 51189.8566124188. The cubic root of 2620401420 is about 1378.6560850561.

Adding to 2620401420 its reverse (241040262), we get a palindrome (2861441682).

The spelling of 2620401420 in words is "two billion, six hundred twenty million, four hundred one thousand, four hundred twenty".