398857613 has 8 divisors (see below), whose sum is σ = 497277120. Its totient is φ = 310798080.

The previous prime is 398857609. The next prime is 398857639. The reversal of 398857613 is 316758893.

It is a happy number.

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 398857613 - 2² = 398857609 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 (398857663) 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, 2589908 + ... + 2590061.

It is an arithmetic number, because the mean of its divisors is an integer number (62159640).

Almost surely, 2^398857613 is an apocalyptic number.

It is an amenable number.

398857613 is a deficient number, since it is larger than the sum of its proper divisors (98419507).

398857613 is a wasteful number, since it uses less digits than its factorization.

398857613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179987.

The product of its digits is 1088640, while the sum is 50.

The square root of 398857613 is about 19971.4199044535. The cubic root of 398857613 is about 736.1041992960.

The spelling of 398857613 in words is "three hundred ninety-eight million, eight hundred fifty-seven thousand, six hundred thirteen".