2499399968 has 24 divisors (see below), whose sum is σ = 5299209468. Its totient is φ = 1153569024.

The previous prime is 2499399967. The next prime is 2499399971. The reversal of 2499399968 is 8699939942.

It can be written as a sum of positive squares in 2 ways, for example, as 2376367504 + 123032464 = 48748^2 + 11092^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2499399898 and 2499399907.

It is not an unprimeable number, because it can be changed into a prime (2499399967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3003671 + ... + 3004502.

Almost surely, 2^2499399968 is an apocalyptic number.

It is an amenable number.

2499399968 is an abundant number, since it is smaller than the sum of its proper divisors (2799809500).

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

2499399968 is a wasteful number, since it uses less digits than its factorization.

2499399968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008196 (or 6008188 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 68.

The square root of 2499399968 is about 49993.9993199184. Note that the first 3 decimals coincide. The cubic root of 2499399968 is about 1357.1002171138.

Adding to 2499399968 its sum of digits (68), we get a square (2499400036 = 49994²).

The spelling of 2499399968 in words is "two billion, four hundred ninety-nine million, three hundred ninety-nine thousand, nine hundred sixty-eight".