4000397859 has 12 divisors (see below), whose sum is σ = 5787725736. Its totient is φ = 2662605792.

The previous prime is 4000397833. The next prime is 4000397861. The reversal of 4000397859 is 9587930004.

It is not a de Polignac number, because 4000397859 - 2⁸ = 4000397603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4000397059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354649 + ... + 365754.

It is an arithmetic number, because the mean of its divisors is an integer number (482310478).

Almost surely, 2^4000397859 is an apocalyptic number.

4000397859 is a deficient number, since it is larger than the sum of its proper divisors (1787327877).

4000397859 is a wasteful number, since it uses less digits than its factorization.

4000397859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721026 (or 721023 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 4000397859 is about 63248.6984767276. The cubic root of 4000397859 is about 1587.4536803729.

The spelling of 4000397859 in words is "four billion, three hundred ninety-seven thousand, eight hundred fifty-nine".