7422115840 has 128 divisors (see below), whose sum is σ = 18048339000. Its totient is φ = 2929721344.

The previous prime is 7422115829. The next prime is 7422115861. The reversal of 7422115840 is 485112247.

It can be written as a sum of positive squares in 4 ways, for example, as 5957369856 + 1464745984 = 77184^2 + 38272^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 7422115796 and 7422115805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14581506 + ... + 14582014.

Almost surely, 2^7422115840 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 7422115840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9024169500).

7422115840 is an abundant number, since it is smaller than the sum of its proper divisors (10626223160).

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

7422115840 is an frugal number, since it uses more digits than its factorization.

7422115840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 7422115840 is about 86151.7024788251. The cubic root of 7422115840 is about 1950.6345373057.

The spelling of 7422115840 in words is "seven billion, four hundred twenty-two million, one hundred fifteen thousand, eight hundred forty".