398429615 has 8 divisors (see below), whose sum is σ = 489234768. Its totient is φ = 311330880.

The previous prime is 398429609. The next prime is 398429623. The reversal of 398429615 is 516924893.

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

It is not a de Polignac number, because 398429615 - 2⁴ = 398429599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398429615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926366 + ... + 926795.

It is an arithmetic number, because the mean of its divisors is an integer number (61154346).

Almost surely, 2^398429615 is an apocalyptic number.

398429615 is a deficient number, since it is larger than the sum of its proper divisors (90805153).

398429615 is a wasteful number, since it uses less digits than its factorization.

398429615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853209.

The product of its digits is 466560, while the sum is 47.

The square root of 398429615 is about 19960.7017662205. The cubic root of 398429615 is about 735.8408104979.

The spelling of 398429615 in words is "three hundred ninety-eight million, four hundred twenty-nine thousand, six hundred fifteen".