40198158 has 192 divisors, whose sum is σ = 123282432. Its totient is φ = 9123840.

The previous prime is 40198157. The next prime is 40198187. The reversal of 40198158 is 85189104.

It is a super-4 number, since 4×40198158⁴ (a number of 32 digits) contains 4444 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 (40198157) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 414366 + ... + 414462.

It is an arithmetic number, because the mean of its divisors is an integer number (642096).

Almost surely, 2^40198158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40198158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61641216).

40198158 is an abundant number, since it is smaller than the sum of its proper divisors (83084274).

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

40198158 is a wasteful number, since it uses less digits than its factorization.

40198158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 40198158 is about 6340.2017318063. The cubic root of 40198158 is about 342.5590016811.

The spelling of 40198158 in words is "forty million, one hundred ninety-eight thousand, one hundred fifty-eight".