2499139440 has 160 divisors (see below), whose sum is σ = 9837941760. Its totient is φ = 571228416.

The previous prime is 2499139421. The next prime is 2499139441. The reversal of 2499139440 is 449319942.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499139441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67524 + ... + 97763.

It is an arithmetic number, because the mean of its divisors is an integer number (61487136).

Almost surely, 2^2499139440 is an apocalyptic number.

2499139440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2499139440 is an abundant number, since it is smaller than the sum of its proper divisors (7338802320).

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

2499139440 is a wasteful number, since it uses less digits than its factorization.

2499139440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165316 (or 165304 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 2499139440 is about 49991.3936593090. The cubic root of 2499139440 is about 1357.0530624773.

The spelling of 2499139440 in words is "two billion, four hundred ninety-nine million, one hundred thirty-nine thousand, four hundred forty".