2620405320 has 128 divisors (see below), whose sum is σ = 8481110400. Its totient is φ = 643866624.

The previous prime is 2620405303. The next prime is 2620405327. The reversal of 2620405320 is 235040262.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2620405327) 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, 1151704 + ... + 1153976.

It is an arithmetic number, because the mean of its divisors is an integer number (66258675).

Almost surely, 2^2620405320 is an apocalyptic number.

2620405320 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 2620405320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4240555200).

2620405320 is an abundant number, since it is smaller than the sum of its proper divisors (5860705080).

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

2620405320 is a wasteful number, since it uses less digits than its factorization.

2620405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3035 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2620405320 is about 51189.8947058890. The cubic root of 2620405320 is about 1378.6567690170.

Adding to 2620405320 its reverse (235040262), we get a palindrome (2855445582).

The spelling of 2620405320 in words is "two billion, six hundred twenty million, four hundred five thousand, three hundred twenty".