400123198 has 8 divisors (see below), whose sum is σ = 608638320. Its totient is φ = 197243760.

The previous prime is 400123193. The next prime is 400123201. The reversal of 400123198 is 891321004.

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 (400123193) 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, 1408743 + ... + 1409026.

It is an arithmetic number, because the mean of its divisors is an integer number (76079790).

Almost surely, 2^400123198 is an apocalyptic number.

400123198 is a deficient number, since it is larger than the sum of its proper divisors (208515122).

400123198 is a wasteful number, since it uses less digits than its factorization.

400123198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817842.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 400123198 is about 20003.0797128842. The cubic root of 400123198 is about 736.8819361822.

The spelling of 400123198 in words is "four hundred million, one hundred twenty-three thousand, one hundred ninety-eight".