2748390878 has 4 divisors (see below), whose sum is σ = 4122586320. Its totient is φ = 1374195438.

The previous prime is 2748390863. The next prime is 2748390899. The reversal of 2748390878 is 8780938472.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2748390878² = 15107304836547221768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687097718 + ... + 687097721.

It is an arithmetic number, because the mean of its divisors is an integer number (1030646580).

Almost surely, 2^2748390878 is an apocalyptic number.

2748390878 is a deficient number, since it is larger than the sum of its proper divisors (1374195442).

2748390878 is a wasteful number, since it uses less digits than its factorization.

2748390878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374195441.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The square root of 2748390878 is about 52425.0977872240. The cubic root of 2748390878 is about 1400.7463500040.

The spelling of 2748390878 in words is "two billion, seven hundred forty-eight million, three hundred ninety thousand, eight hundred seventy-eight".