398629617 has 8 divisors (see below), whose sum is σ = 562771296. Its totient is φ = 250120512.

The previous prime is 398629613. The next prime is 398629619. The reversal of 398629617 is 716926893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398629617 - 2² = 398629613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 7816267 = 398629617 / (3 + 9 + 8 + 6 + 2 + 9 + 6 + 1 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 398629617.

It is not an unprimeable number, because it can be changed into a prime (398629613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3908083 + ... + 3908184.

It is an arithmetic number, because the mean of its divisors is an integer number (70346412).

Almost surely, 2^398629617 is an apocalyptic number.

It is an amenable number.

398629617 is a deficient number, since it is larger than the sum of its proper divisors (164141679).

398629617 is a wasteful number, since it uses less digits than its factorization.

398629617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816287.

The product of its digits is 979776, while the sum is 51.

The square root of 398629617 is about 19965.7110316663. The cubic root of 398629617 is about 735.9639146464.

The spelling of 398629617 in words is "three hundred ninety-eight million, six hundred twenty-nine thousand, six hundred seventeen".