2778480490 has 8 divisors (see below), whose sum is σ = 5001264900. Its totient is φ = 1111392192.

The previous prime is 2778480461. The next prime is 2778480491. The reversal of 2778480490 is 940848772.

It can be written as a sum of positive squares in 2 ways, for example, as 2330861841 + 447618649 = 48279^2 + 21157^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2778480491) 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, 138924015 + ... + 138924034.

Almost surely, 2^2778480490 is an apocalyptic number.

2778480490 is a deficient number, since it is larger than the sum of its proper divisors (2222784410).

2778480490 is a wasteful number, since it uses less digits than its factorization.

2778480490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277848056.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 2778480490 is about 52711.2937613942. The cubic root of 2778480490 is about 1405.8396369304.

The spelling of 2778480490 in words is "two billion, seven hundred seventy-eight million, four hundred eighty thousand, four hundred ninety".