398253679 has 8 divisors (see below), whose sum is σ = 425623248. Its totient is φ = 371322240.

The previous prime is 398253677. The next prime is 398253719. The reversal of 398253679 is 976352893.

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

It is a cyclic number.

It is not a de Polignac number, because 398253679 - 2¹ = 398253677 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 (398253677) 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, 107652 + ... + 111289.

It is an arithmetic number, because the mean of its divisors is an integer number (53202906).

Almost surely, 2^398253679 is an apocalyptic number.

398253679 is a deficient number, since it is larger than the sum of its proper divisors (27369569).

398253679 is a wasteful number, since it uses less digits than its factorization.

398253679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219065.

The product of its digits is 2449440, while the sum is 52.

The square root of 398253679 is about 19956.2942201201. The cubic root of 398253679 is about 735.7324852596.

The spelling of 398253679 in words is "three hundred ninety-eight million, two hundred fifty-three thousand, six hundred seventy-nine".