2505047440 has 40 divisors (see below), whose sum is σ = 6656270400. Its totient is φ = 858873216.

The previous prime is 2505047387. The next prime is 2505047443. The reversal of 2505047440 is 447405052.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2505047443) 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, 2236090 + ... + 2237209.

It is an arithmetic number, because the mean of its divisors is an integer number (166406760).

Almost surely, 2^2505047440 is an apocalyptic number.

2505047440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2505047440 is an abundant number, since it is smaller than the sum of its proper divisors (4151222960).

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

2505047440 is a wasteful number, since it uses less digits than its factorization.

2505047440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473319 (or 4473313 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 2505047440 is about 50050.4489490354. The cubic root of 2505047440 is about 1358.1215849517.

The spelling of 2505047440 in words is "two billion, five hundred five million, forty-seven thousand, four hundred forty".