4001388120394 has 16 divisors (see below), whose sum is σ = 6859802480256. Its totient is φ = 1714810626000.

The previous prime is 4001388120349. The next prime is 4001388120437. The reversal of 4001388120394 is 4930218831004.

It is a super-2 number, since 2×4001388120394² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4001388120394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5477097 + ... + 6164524.

It is an arithmetic number, because the mean of its divisors is an integer number (428737655016).

Almost surely, 2^{4001388120394} is an apocalyptic number.

4001388120394 is a deficient number, since it is larger than the sum of its proper divisors (2858414359862).

4001388120394 is a wasteful number, since it uses less digits than its factorization.

4001388120394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11666181.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 4001388120394 in words is "four trillion, one billion, three hundred eighty-eight million, one hundred twenty thousand, three hundred ninety-four".