398698719 has 24 divisors (see below), whose sum is σ = 562864176. Its totient is φ = 250876800.

The previous prime is 398698711. The next prime is 398698733. The reversal of 398698719 is 917896893.

It is not a de Polignac number, because 398698719 - 2³ = 398698711 is a prime.

It is a super-2 number, since 2×398698719² = 317921337064481922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398698711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116517 + ... + 119889.

It is an arithmetic number, because the mean of its divisors is an integer number (23452674).

Almost surely, 2^398698719 is an apocalyptic number.

398698719 is a deficient number, since it is larger than the sum of its proper divisors (164165457).

398698719 is a wasteful number, since it uses less digits than its factorization.

398698719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479 (or 3448 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 60.

The square root of 398698719 is about 19967.4414735589. The cubic root of 398698719 is about 736.0064383642.

The spelling of 398698719 in words is "three hundred ninety-eight million, six hundred ninety-eight thousand, seven hundred nineteen".