398962871 has 4 divisors (see below), whose sum is σ = 400675392. Its totient is φ = 397250352.

The previous prime is 398962859. The next prime is 398962873. The reversal of 398962871 is 178269893.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398962871 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 (398962873) 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, 855911 + ... + 856376.

It is an arithmetic number, because the mean of its divisors is an integer number (100168848).

Almost surely, 2^398962871 is an apocalyptic number.

398962871 is a deficient number, since it is larger than the sum of its proper divisors (1712521).

398962871 is a wasteful number, since it uses less digits than its factorization.

398962871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712520.

The product of its digits is 1306368, while the sum is 53.

The square root of 398962871 is about 19974.0549463548. The cubic root of 398962871 is about 736.1689459111.

The spelling of 398962871 in words is "three hundred ninety-eight million, nine hundred sixty-two thousand, eight hundred seventy-one".