398967965 has 16 divisors (see below), whose sum is σ = 523368000. Its totient is φ = 289557120.

The previous prime is 398967949. The next prime is 398967973. The reversal of 398967965 is 569769893.

It is not a de Polignac number, because 398967965 - 2⁴ = 398967949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398967898 and 398967907.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20177 + ... + 34713.

It is an arithmetic number, because the mean of its divisors is an integer number (32710500).

Almost surely, 2^398967965 is an apocalyptic number.

It is an amenable number.

398967965 is a deficient number, since it is larger than the sum of its proper divisors (124400035).

398967965 is a wasteful number, since it uses less digits than its factorization.

398967965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15052.

The product of its digits is 22044960, while the sum is 62.

The square root of 398967965 is about 19974.1824613675. The cubic root of 398967965 is about 736.1720790587.

The spelling of 398967965 in words is "three hundred ninety-eight million, nine hundred sixty-seven thousand, nine hundred sixty-five".