4008400447 has 4 divisors (see below), whose sum is σ = 4025033056. Its totient is φ = 3991767840.

The previous prime is 4008400391. The next prime is 4008400457. The reversal of 4008400447 is 7440048004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4008400447 - 2²³ = 4000011839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4008400457) 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, 8315943 + ... + 8316424.

It is an arithmetic number, because the mean of its divisors is an integer number (1006258264).

Almost surely, 2^4008400447 is an apocalyptic number.

4008400447 is a deficient number, since it is larger than the sum of its proper divisors (16632609).

4008400447 is a wasteful number, since it uses less digits than its factorization.

4008400447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16632608.

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 4008400447 is about 63311.9297368197. The cubic root of 4008400447 is about 1588.5115148323.

The spelling of 4008400447 in words is "four billion, eight million, four hundred thousand, four hundred forty-seven".