4002643678 has 32 divisors (see below), whose sum is σ = 7055050752. Its totient is φ = 1684135200.

The previous prime is 4002643669. The next prime is 4002643681. The reversal of 4002643678 is 8763462004.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4002643678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111901 + ... + 143272.

It is an arithmetic number, because the mean of its divisors is an integer number (220470336).

Almost surely, 2^4002643678 is an apocalyptic number.

4002643678 is a deficient number, since it is larger than the sum of its proper divisors (3052407074).

4002643678 is a wasteful number, since it uses less digits than its factorization.

4002643678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255240.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 4002643678 is about 63266.4498608860. The cubic root of 4002643678 is about 1587.7506897219.

The spelling of 4002643678 in words is "four billion, two million, six hundred forty-three thousand, six hundred seventy-eight".