398422001 has 8 divisors (see below), whose sum is σ = 421243680. Its totient is φ = 375785568.

The previous prime is 398421997. The next prime is 398422007. The reversal of 398422001 is 100224893.

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 398422001 - 2² = 398421997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398422007) 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, 41876 + ... + 50501.

It is an arithmetic number, because the mean of its divisors is an integer number (52655460).

Almost surely, 2^398422001 is an apocalyptic number.

It is an amenable number.

398422001 is a deficient number, since it is larger than the sum of its proper divisors (22821679).

398422001 is a wasteful number, since it uses less digits than its factorization.

398422001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92623.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 398422001 is about 19960.5110405520. The cubic root of 398422001 is about 735.8361231559.

Adding to 398422001 its reverse (100224893), we get a palindrome (498646894).

The spelling of 398422001 in words is "three hundred ninety-eight million, four hundred twenty-two thousand, one".