4006278406 has 8 divisors (see below), whose sum is σ = 6471680544. Its totient is φ = 1849051560.

The previous prime is 4006278403. The next prime is 4006278439. The reversal of 4006278406 is 6048726004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006278401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77043790 + ... + 77043841.

It is an arithmetic number, because the mean of its divisors is an integer number (808960068).

Almost surely, 2^4006278406 is an apocalyptic number.

4006278406 is a deficient number, since it is larger than the sum of its proper divisors (2465402138).

4006278406 is a wasteful number, since it uses less digits than its factorization.

4006278406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154087646.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 4006278406 is about 63295.1688993718. The cubic root of 4006278406 is about 1588.2311468376.

The spelling of 4006278406 in words is "four billion, six million, two hundred seventy-eight thousand, four hundred six".