395289887 has 4 divisors (see below), whose sum is σ = 396930336. Its totient is φ = 393649440.

The previous prime is 395289871. The next prime is 395289893. The reversal of 395289887 is 788982593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 395289887 - 2⁴ = 395289871 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 (395289827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819863 + ... + 820344.

It is an arithmetic number, because the mean of its divisors is an integer number (99232584).

Almost surely, 2^395289887 is an apocalyptic number.

395289887 is a deficient number, since it is larger than the sum of its proper divisors (1640449).

395289887 is a wasteful number, since it uses less digits than its factorization.

395289887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640448.

The product of its digits is 8709120, while the sum is 59.

The square root of 395289887 is about 19881.8984757492. The cubic root of 395289887 is about 733.9028392653.

It can be divided in two parts, 3952 and 89887, that added together give a palindrome (93839).

The spelling of 395289887 in words is "three hundred ninety-five million, two hundred eighty-nine thousand, eight hundred eighty-seven".