398544663 has 16 divisors (see below), whose sum is σ = 582624000. Its totient is φ = 240324480.

The previous prime is 398544661. The next prime is 398544691. The reversal of 398544663 is 366445893.

398544663 = T₈₅₀₇ + T₈₅₀₈ + ... + T₈₅₁₇.

It is not a de Polignac number, because 398544663 - 2¹ = 398544661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398544661) 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, 23778 + ... + 36911.

It is an arithmetic number, because the mean of its divisors is an integer number (36414000).

Almost surely, 2^398544663 is an apocalyptic number.

398544663 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

398544663 is a deficient number, since it is larger than the sum of its proper divisors (184079337).

398544663 is a wasteful number, since it uses less digits than its factorization.

398544663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60902.

The product of its digits is 1866240, while the sum is 48.

The square root of 398544663 is about 19963.5834208190. The cubic root of 398544663 is about 735.9116292518.

The spelling of 398544663 in words is "three hundred ninety-eight million, five hundred forty-four thousand, six hundred sixty-three".