398514657 has 16 divisors (see below), whose sum is σ = 535101440. Its totient is φ = 263809872.

The previous prime is 398514601. The next prime is 398514661. The reversal of 398514657 is 756415893.

It is not a de Polignac number, because 398514657 - 2¹⁸ = 398252513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398514257) 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, 310944 + ... + 312222.

It is an arithmetic number, because the mean of its divisors is an integer number (33443840).

Almost surely, 2^398514657 is an apocalyptic number.

It is an amenable number.

398514657 is a deficient number, since it is larger than the sum of its proper divisors (136586783).

398514657 is a wasteful number, since it uses less digits than its factorization.

398514657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

The product of its digits is 907200, while the sum is 48.

The square root of 398514657 is about 19962.8318882868. The cubic root of 398514657 is about 735.8931601227.

It can be divided in two parts, 398514 and 657, that added together give a triangular number (399171 = T₈₉₃).

The spelling of 398514657 in words is "three hundred ninety-eight million, five hundred fourteen thousand, six hundred fifty-seven".