398661435 has 12 divisors (see below), whose sum is σ = 691013232. Its totient is φ = 212619408.

The previous prime is 398661433. The next prime is 398661437. The reversal of 398661435 is 534166893.

It is an interprime number because it is at equal distance from previous prime (398661433) and next prime (398661437).

It is not a de Polignac number, because 398661435 - 2¹ = 398661433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8859143 = 398661435 / (3 + 9 + 8 + 6 + 6 + 1 + 4 + 3 + 5).

It is not an unprimeable number, because it can be changed into a prime (398661433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4429527 + ... + 4429616.

It is an arithmetic number, because the mean of its divisors is an integer number (57584436).

Almost surely, 2^398661435 is an apocalyptic number.

398661435 is a deficient number, since it is larger than the sum of its proper divisors (292351797).

398661435 is a wasteful number, since it uses less digits than its factorization.

398661435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8859154 (or 8859151 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 398661435 is about 19966.5078318668. The cubic root of 398661435 is about 735.9834952929.

The spelling of 398661435 in words is "three hundred ninety-eight million, six hundred sixty-one thousand, four hundred thirty-five".