2621493440 has 28 divisors (see below), whose sum is σ = 6242432016. Its totient is φ = 1048597248.

The previous prime is 2621493439. The next prime is 2621493443. The reversal of 2621493440 is 443941262.

It is a self number, because there is not a number n which added to its sum of digits gives 2621493440.

It is not an unprimeable number, because it can be changed into a prime (2621493443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4095764 + ... + 4096403.

Almost surely, 2^2621493440 is an apocalyptic number.

2621493440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2621493440 is an abundant number, since it is smaller than the sum of its proper divisors (3620938576).

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

2621493440 is an equidigital number, since it uses as much as digits as its factorization.

2621493440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192184 (or 8192174 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 2621493440 is about 51200.5218723403. The cubic root of 2621493440 is about 1378.8475711034.

The spelling of 2621493440 in words is "two billion, six hundred twenty-one million, four hundred ninety-three thousand, four hundred forty".