398154459 has 4 divisors (see below), whose sum is σ = 530872616. Its totient is φ = 265436304.

The previous prime is 398154451. The next prime is 398154509. The reversal of 398154459 is 954451893.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 398154459 - 2³ = 398154451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398154451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66359074 + ... + 66359079.

It is an arithmetic number, because the mean of its divisors is an integer number (132718154).

Almost surely, 2^398154459 is an apocalyptic number.

398154459 is a deficient number, since it is larger than the sum of its proper divisors (132718157).

398154459 is a wasteful number, since it uses less digits than its factorization.

398154459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132718156.

The product of its digits is 777600, while the sum is 48.

The square root of 398154459 is about 19953.8081327851. The cubic root of 398154459 is about 735.6713806219.

The spelling of 398154459 in words is "three hundred ninety-eight million, one hundred fifty-four thousand, four hundred fifty-nine".