2639720046 has 32 divisors (see below), whose sum is σ = 5561395200. Its totient is φ = 832982400.

The previous prime is 2639720021. The next prime is 2639720047. The reversal of 2639720046 is 6400279362.

It is a junction number, because it is equal to n+sod(n) for n = 2639719986 and 2639720013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639720047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161971 + ... + 177521.

It is an arithmetic number, because the mean of its divisors is an integer number (173793600).

Almost surely, 2^2639720046 is an apocalyptic number.

2639720046 is an abundant number, since it is smaller than the sum of its proper divisors (2921675154).

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

2639720046 is a wasteful number, since it uses less digits than its factorization.

2639720046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17064.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 2639720046 is about 51378.2059437657. The cubic root of 2639720046 is about 1382.0357907241.

The spelling of 2639720046 in words is "two billion, six hundred thirty-nine million, seven hundred twenty thousand, forty-six".