398016910927 has 4 divisors (see below), whose sum is σ = 402812295480. Its totient is φ = 393221526376.

The previous prime is 398016910901. The next prime is 398016910957. The reversal of 398016910927 is 729019610893.

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 398016910927 - 2³¹ = 395869427279 is a prime.

It is a super-2 number, since 2×398016910927² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398016910957) 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, 2397692152 + ... + 2397692317.

It is an arithmetic number, because the mean of its divisors is an integer number (100703073870).

Almost surely, 2^398016910927 is an apocalyptic number.

398016910927 is a deficient number, since it is larger than the sum of its proper divisors (4795384553).

398016910927 is an equidigital number, since it uses as much as digits as its factorization.

398016910927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795384552.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 398016910927 in words is "three hundred ninety-eight billion, sixteen million, nine hundred ten thousand, nine hundred twenty-seven".