398148861 has 16 divisors (see below), whose sum is σ = 586460160. Its totient is φ = 238246320.

The previous prime is 398148851. The next prime is 398148893. The reversal of 398148861 is 168841893.

It is not a de Polignac number, because 398148861 - 2¹³ = 398140669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398148861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398148811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73755 + ... + 78968.

It is an arithmetic number, because the mean of its divisors is an integer number (36653760).

Almost surely, 2^398148861 is an apocalyptic number.

It is an amenable number.

398148861 is a deficient number, since it is larger than the sum of its proper divisors (188311299).

398148861 is a wasteful number, since it uses less digits than its factorization.

398148861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152816.

The product of its digits is 331776, while the sum is 48.

The square root of 398148861 is about 19953.6678583162. The cubic root of 398148861 is about 735.6679327910.

The spelling of 398148861 in words is "three hundred ninety-eight million, one hundred forty-eight thousand, eight hundred sixty-one".