2635394840 has 32 divisors (see below), whose sum is σ = 6385765680. Its totient is φ = 973068672.

The previous prime is 2635394833. The next prime is 2635394849. The reversal of 2635394840 is 484935362.

2635394840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2635394791 and 2635394800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2635394849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2533514 + ... + 2534553.

Almost surely, 2^2635394840 is an apocalyptic number.

2635394840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2635394840 is an abundant number, since it is smaller than the sum of its proper divisors (3750370840).

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

2635394840 is a wasteful number, since it uses less digits than its factorization.

2635394840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068091 (or 5068087 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 2635394840 is about 51336.0968520202. The cubic root of 2635394840 is about 1381.2805518928.

The spelling of 2635394840 in words is "two billion, six hundred thirty-five million, three hundred ninety-four thousand, eight hundred forty".