4387391855 has 16 divisors (see below), whose sum is σ = 6563994624. Its totient is φ = 2734997280.

The previous prime is 4387391843. The next prime is 4387391863. The reversal of 4387391855 is 5581937834.

It is not a de Polignac number, because 4387391855 - 2⁶ = 4387391791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4387391797 and 4387391806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5697527 + ... + 5698296.

It is an arithmetic number, because the mean of its divisors is an integer number (410249664).

Almost surely, 2^4387391855 is an apocalyptic number.

4387391855 is a deficient number, since it is larger than the sum of its proper divisors (2176602769).

4387391855 is a wasteful number, since it uses less digits than its factorization.

4387391855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11395846.

The product of its digits is 3628800, while the sum is 53.

The square root of 4387391855 is about 66237.3901584294. The cubic root of 4387391855 is about 1637.0758739189.

The spelling of 4387391855 in words is "four billion, three hundred eighty-seven million, three hundred ninety-one thousand, eight hundred fifty-five".