6240451840 has 108 divisors (see below), whose sum is σ = 17388469476. Its totient is φ = 2139561984.

The previous prime is 6240451801. The next prime is 6240451849. The reversal of 6240451840 is 481540426.

It can be written as a sum of positive squares in 2 ways, for example, as 2926377216 + 3314074624 = 54096^2 + 57568^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6240451796 and 6240451805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6240451849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12972 + ... + 112468.

It is an arithmetic number, because the mean of its divisors is an integer number (161004347).

Almost surely, 2^6240451840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6240451840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8694234738).

6240451840 is an abundant number, since it is smaller than the sum of its proper divisors (11148017636).

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

6240451840 is an equidigital number, since it uses as much as digits as its factorization.

6240451840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99532 (or 99511 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 6240451840 is about 78996.5305567276. The cubic root of 6240451840 is about 1841.0772519834.

It can be divided in two parts, 62404 and 51840, that added together give a square (114244 = 338²).

The spelling of 6240451840 in words is "six billion, two hundred forty million, four hundred fifty-one thousand, eight hundred forty".