420154198 has 8 divisors (see below), whose sum is σ = 631442520. Its totient is φ = 209673360.

The previous prime is 420154187. The next prime is 420154199. The reversal of 420154198 is 891451024.

It is a happy number.

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 (420154199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200568 + ... + 202651.

It is an arithmetic number, because the mean of its divisors is an integer number (78930315).

Almost surely, 2^420154198 is an apocalyptic number.

420154198 is a deficient number, since it is larger than the sum of its proper divisors (211288322).

420154198 is a wasteful number, since it uses less digits than its factorization.

420154198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403742.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 420154198 is about 20497.6632326712. The cubic root of 420154198 is about 748.9788758531.

The spelling of 420154198 in words is "four hundred twenty million, one hundred fifty-four thousand, one hundred ninety-eight".