398556429 has 16 divisors (see below), whose sum is σ = 553597440. Its totient is φ = 254767680.

The previous prime is 398556383. The next prime is 398556437. The reversal of 398556429 is 924655893.

It is not a de Polignac number, because 398556429 - 2⁹ = 398555917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398556439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9522 + ... + 29795.

It is an arithmetic number, because the mean of its divisors is an integer number (34599840).

Almost surely, 2^398556429 is an apocalyptic number.

It is an amenable number.

398556429 is a deficient number, since it is larger than the sum of its proper divisors (155041011).

398556429 is a wasteful number, since it uses less digits than its factorization.

398556429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39460.

The product of its digits is 2332800, while the sum is 51.

The square root of 398556429 is about 19963.8781052179. The cubic root of 398556429 is about 735.9188711428.

The spelling of 398556429 in words is "three hundred ninety-eight million, five hundred fifty-six thousand, four hundred twenty-nine".