398155464 has 96 divisors (see below), whose sum is σ = 1235208000. Its totient is φ = 113498496.

The previous prime is 398155463. The next prime is 398155489. The reversal of 398155464 is 464551893.

398155464 is a `hidden beast` number, since 3 + 98 + 1 + 554 + 6 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (398155463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371922 + ... + 372990.

It is an arithmetic number, because the mean of its divisors is an integer number (12866750).

Almost surely, 2^398155464 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 398155464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617604000).

398155464 is an abundant number, since it is smaller than the sum of its proper divisors (837052536).

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

398155464 is a wasteful number, since it uses less digits than its factorization.

398155464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827 (or 1820 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 398155464 is about 19953.8333159321. The cubic root of 398155464 is about 735.6719996020.

The spelling of 398155464 in words is "three hundred ninety-eight million, one hundred fifty-five thousand, four hundred sixty-four".