2489453878 has 4 divisors (see below), whose sum is σ = 3734180820. Its totient is φ = 1244726938.

The previous prime is 2489453833. The next prime is 2489453899. The reversal of 2489453878 is 8783549842.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8783549842 = 2 ⋅4391774921.

It is a super-2 number, since 2×2489453878² = 12394761221378477768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622363468 + ... + 622363471.

It is an arithmetic number, because the mean of its divisors is an integer number (933545205).

Almost surely, 2^2489453878 is an apocalyptic number.

2489453878 is a deficient number, since it is larger than the sum of its proper divisors (1244726942).

2489453878 is a wasteful number, since it uses less digits than its factorization.

2489453878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244726941.

The product of its digits is 15482880, while the sum is 58.

The square root of 2489453878 is about 49894.4273241010. The cubic root of 2489453878 is about 1355.2976798175.

The spelling of 2489453878 in words is "two billion, four hundred eighty-nine million, four hundred fifty-three thousand, eight hundred seventy-eight".