2778206742 has 32 divisors (see below), whose sum is σ = 6536959200. Its totient is φ = 871593984.

The previous prime is 2778206729. The next prime is 2778206749. The reversal of 2778206742 is 2476028772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778206749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512267 + ... + 1514102.

It is an arithmetic number, because the mean of its divisors is an integer number (204279975).

Almost surely, 2^2778206742 is an apocalyptic number.

2778206742 is an abundant number, since it is smaller than the sum of its proper divisors (3758752458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2778206742 is a wasteful number, since it uses less digits than its factorization.

2778206742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026397 (or 3026391 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The square root of 2778206742 is about 52708.6970243052. The cubic root of 2778206742 is about 1405.7934655992.

The spelling of 2778206742 in words is "two billion, seven hundred seventy-eight million, two hundred six thousand, seven hundred forty-two".