401998022 has 8 divisors (see below), whose sum is σ = 603939672. Its totient is φ = 200684800.

The previous prime is 401998019. The next prime is 401998027. The reversal of 401998022 is 220899104.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401998027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155504 + ... + 158067.

It is an arithmetic number, because the mean of its divisors is an integer number (75492459).

Almost surely, 2^401998022 is an apocalyptic number.

401998022 is a deficient number, since it is larger than the sum of its proper divisors (201941650).

401998022 is a wasteful number, since it uses less digits than its factorization.

401998022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314214.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 401998022 is about 20049.8883288661. Note that the first 3 decimals coincide. The cubic root of 401998022 is about 738.0310587370.

The spelling of 401998022 in words is "four hundred one million, nine hundred ninety-eight thousand, twenty-two".