400242198 has 8 divisors (see below), whose sum is σ = 800484408. Its totient is φ = 133414064.

The previous prime is 400242197. The next prime is 400242217. The reversal of 400242198 is 891242004.

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

400242198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400242197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33353511 + ... + 33353522.

It is an arithmetic number, because the mean of its divisors is an integer number (100060551).

Almost surely, 2^400242198 is an apocalyptic number.

400242198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400242198 is a wasteful number, since it uses less digits than its factorization.

400242198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66707038.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 400242198 is about 20006.0540337169. The cubic root of 400242198 is about 736.9549805671.

The spelling of 400242198 in words is "four hundred million, two hundred forty-two thousand, one hundred ninety-eight".