4092642778 has 12 divisors (see below), whose sum is σ = 7141244202. Its totient is φ = 1753989720.

The previous prime is 4092642773. The next prime is 4092642857. The reversal of 4092642778 is 8772462904.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4003472529 + 89170249 = 63273^2 + 9443^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (4092642773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20880733 + ... + 20880928.

Almost surely, 2^4092642778 is an apocalyptic number.

4092642778 is a deficient number, since it is larger than the sum of its proper divisors (3048601424).

4092642778 is a wasteful number, since it uses less digits than its factorization.

4092642778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41761677 (or 41761670 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 4092642778 is about 63973.7663265186. The cubic root of 4092642778 is about 1599.5627422332.

The spelling of 4092642778 in words is "four billion, ninety-two million, six hundred forty-two thousand, seven hundred seventy-eight".