398148591 has 16 divisors (see below), whose sum is σ = 560390400. Its totient is φ = 250748928.

The previous prime is 398148587. The next prime is 398148631. The reversal of 398148591 is 195841893.

It is not a de Polignac number, because 398148591 - 2² = 398148587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398148591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398148571) 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, 10735 + ... + 30191.

It is an arithmetic number, because the mean of its divisors is an integer number (35024400).

Almost surely, 2^398148591 is an apocalyptic number.

398148591 is a deficient number, since it is larger than the sum of its proper divisors (162241809).

398148591 is a wasteful number, since it uses less digits than its factorization.

398148591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19838.

The product of its digits is 311040, while the sum is 48.

The square root of 398148591 is about 19953.6610926416. The cubic root of 398148591 is about 735.6677664961.

The spelling of 398148591 in words is "three hundred ninety-eight million, one hundred forty-eight thousand, five hundred ninety-one".