4080009391 has 16 divisors (see below), whose sum is σ = 4298572800. Its totient is φ = 3867119200.

The previous prime is 4080009389. The next prime is 4080009457. The reversal of 4080009391 is 1939000804.

4080009391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4080009391 - 2¹ = 4080009389 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 (4080009341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487956 + ... + 496246.

It is an arithmetic number, because the mean of its divisors is an integer number (268660800).

Almost surely, 2^4080009391 is an apocalyptic number.

4080009391 is a deficient number, since it is larger than the sum of its proper divisors (218563409).

4080009391 is a wasteful number, since it uses less digits than its factorization.

4080009391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8630.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 4080009391 is about 63874.9512015469. The cubic root of 4080009391 is about 1597.9151740711.

It can be divided in two parts, 4080009 and 391, that added together give a square (4080400 = 2020²).

The spelling of 4080009391 in words is "four billion, eighty million, nine thousand, three hundred ninety-one".