398554877 has 12 divisors (see below), whose sum is σ = 473492160. Its totient is φ = 334348056.

The previous prime is 398554873. The next prime is 398554883. The reversal of 398554877 is 778455893.

It is not a de Polignac number, because 398554877 - 2² = 398554873 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398554873) 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 11 ways as a sum of consecutive naturals, for example, 84227 + ... + 88832.

It is an arithmetic number, because the mean of its divisors is an integer number (39457680).

Almost surely, 2^398554877 is an apocalyptic number.

It is an amenable number.

398554877 is a deficient number, since it is larger than the sum of its proper divisors (74937283).

398554877 is a wasteful number, since it uses less digits than its factorization.

398554877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173120 (or 173113 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 56.

The square root of 398554877 is about 19963.8392349768. The cubic root of 398554877 is about 735.9179159058.

The spelling of 398554877 in words is "three hundred ninety-eight million, five hundred fifty-four thousand, eight hundred seventy-seven".