2489978786 has 8 divisors (see below), whose sum is σ = 3737338320. Its totient is φ = 1244199348.

The previous prime is 2489978779. The next prime is 2489978833. The reversal of 2489978786 is 6878799842.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391076 + ... + 397391.

It is an arithmetic number, because the mean of its divisors is an integer number (467167290).

Almost surely, 2^2489978786 is an apocalyptic number.

2489978786 is a deficient number, since it is larger than the sum of its proper divisors (1247359534).

2489978786 is a wasteful number, since it uses less digits than its factorization.

2489978786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790048.

The product of its digits is 97542144, while the sum is 68.

The square root of 2489978786 is about 49899.6872334887. The cubic root of 2489978786 is about 1355.3929291686.

The spelling of 2489978786 in words is "two billion, four hundred eighty-nine million, nine hundred seventy-eight thousand, seven hundred eighty-six".