40155198 has 32 divisors (see below), whose sum is σ = 84045600. Its totient is φ = 12773376.

The previous prime is 40155197. The next prime is 40155209. The reversal of 40155198 is 89155104.

40155198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40155198² = 3224879852838408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40155197) 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 15 ways as a sum of consecutive naturals, for example, 14190 + ... + 16782.

It is an arithmetic number, because the mean of its divisors is an integer number (2626425).

Almost surely, 2^40155198 is an apocalyptic number.

40155198 is an abundant number, since it is smaller than the sum of its proper divisors (43890402).

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

40155198 is a wasteful number, since it uses less digits than its factorization.

40155198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 40155198 is about 6336.8129213351. The cubic root of 40155198 is about 342.4369265991.

The spelling of 40155198 in words is "forty million, one hundred fifty-five thousand, one hundred ninety-eight".