2790778197 has 8 divisors (see below), whose sum is σ = 3916881760. Its totient is φ = 1762596720.

The previous prime is 2790778171. The next prime is 2790778223. The reversal of 2790778197 is 7918770972.

It is an interprime number because it is at equal distance from previous prime (2790778171) and next prime (2790778223).

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

It is not a de Polignac number, because 2790778197 - 2²⁴ = 2774000981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 48961021 = 2790778197 / (2 + 7 + 9 + 0 + 7 + 7 + 8 + 1 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2790778127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24480454 + ... + 24480567.

It is an arithmetic number, because the mean of its divisors is an integer number (489610220).

Almost surely, 2^2790778197 is an apocalyptic number.

It is an amenable number.

2790778197 is a deficient number, since it is larger than the sum of its proper divisors (1126103563).

2790778197 is a wasteful number, since it uses less digits than its factorization.

2790778197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48961043.

The product of its (nonzero) digits is 3111696, while the sum is 57.

The square root of 2790778197 is about 52827.8165079724. The cubic root of 2790778197 is about 1407.9106921673.

The spelling of 2790778197 in words is "two billion, seven hundred ninety million, seven hundred seventy-eight thousand, one hundred ninety-seven".