398545000 has 160 divisors (see below), whose sum is σ = 1090900800. Its totient is φ = 133632000.

The previous prime is 398544997. The next prime is 398545003. The reversal of 398545000 is 545893.

It is an interprime number because it is at equal distance from previous prime (398544997) and next prime (398545003).

It is not an unprimeable number, because it can be changed into a prime (398545003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2064904 + ... + 2065096.

It is an arithmetic number, because the mean of its divisors is an integer number (6818130).

Almost surely, 2^398545000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545450400).

398545000 is an abundant number, since it is smaller than the sum of its proper divisors (692355800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398545000 is a wasteful number, since it uses less digits than its factorization.

398545000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 398545000 is about 19963.5918611857. The cubic root of 398545000 is about 735.9118366749.

The spelling of 398545000 in words is "three hundred ninety-eight million, five hundred forty-five thousand".