40143198 has 16 divisors (see below), whose sum is σ = 80363520. Its totient is φ = 13368216.

The previous prime is 40143197. The next prime is 40143227. The reversal of 40143198 is 89134104.

It is a happy number.

It is a super-2 number, since 2×40143198² = 3222952691334408, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143193) 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, 5283 + ... + 10401.

It is an arithmetic number, because the mean of its divisors is an integer number (5022720).

Almost surely, 2^40143198 is an apocalyptic number.

40143198 is an abundant number, since it is smaller than the sum of its proper divisors (40220322).

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

40143198 is a wasteful number, since it uses less digits than its factorization.

40143198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6431.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 40143198 is about 6335.8660023709. The cubic root of 40143198 is about 342.4028118582.

The spelling of 40143198 in words is "forty million, one hundred forty-three thousand, one hundred ninety-eight".