394254597887 has 16 divisors (see below), whose sum is σ = 397672104960. Its totient is φ = 390852303168.

The previous prime is 394254597883. The next prime is 394254597907. The reversal of 394254597887 is 788795452493.

It is a cyclic number.

It is not a de Polignac number, because 394254597887 - 2² = 394254597883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394254597887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394254597883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178637138 + ... + 178639344.

It is an arithmetic number, because the mean of its divisors is an integer number (24854506560).

Almost surely, 2^394254597887 is an apocalyptic number.

394254597887 is a deficient number, since it is larger than the sum of its proper divisors (3417507073).

394254597887 is a wasteful number, since it uses less digits than its factorization.

394254597887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990.

The product of its digits is 609638400, while the sum is 71.

The spelling of 394254597887 in words is "three hundred ninety-four billion, two hundred fifty-four million, five hundred ninety-seven thousand, eight hundred eighty-seven".