398203561 has 8 divisors (see below), whose sum is σ = 455444864. Its totient is φ = 341051040.

The previous prime is 398203549. The next prime is 398203573. The reversal of 398203561 is 165302893.

It is an interprime number because it is at equal distance from previous prime (398203549) and next prime (398203573).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398203561 - 2⁹ = 398203049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398203561.

It is not an unprimeable number, because it can be changed into a prime (398203511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12285 + ... + 30778.

It is an arithmetic number, because the mean of its divisors is an integer number (56930608).

Almost surely, 2^398203561 is an apocalyptic number.

It is an amenable number.

398203561 is a deficient number, since it is larger than the sum of its proper divisors (57241303).

398203561 is a wasteful number, since it uses less digits than its factorization.

398203561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44391.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 398203561 is about 19955.0384865577. The cubic root of 398203561 is about 735.7016213576.

The spelling of 398203561 in words is "three hundred ninety-eight million, two hundred three thousand, five hundred sixty-one".