4002778605 has 48 divisors (see below), whose sum is σ = 7775303040. Its totient is φ = 1722190848.

The previous prime is 4002778601. The next prime is 4002778607. The reversal of 4002778605 is 5068772004.

It is not a de Polignac number, because 4002778605 - 2² = 4002778601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002778601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35610 + ... + 96299.

It is an arithmetic number, because the mean of its divisors is an integer number (161985480).

Almost surely, 2^4002778605 is an apocalyptic number.

It is an amenable number.

4002778605 is a deficient number, since it is larger than the sum of its proper divisors (3772524435).

4002778605 is a wasteful number, since it uses less digits than its factorization.

4002778605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131958 (or 131941 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 4002778605 is about 63267.5161911703. The cubic root of 4002778605 is about 1587.7685302666.

The spelling of 4002778605 in words is "four billion, two million, seven hundred seventy-eight thousand, six hundred five".