40198156 has 12 divisors (see below), whose sum is σ = 70521640. Its totient is φ = 20049120.

The previous prime is 40198139. The next prime is 40198157. The reversal of 40198156 is 65189104.

It is a super-4 number, since 4×40198156⁴ (a number of 32 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 10650 + ... + 13921.

Almost surely, 2^40198156 is an apocalyptic number.

It is an amenable number.

40198156 is a deficient number, since it is larger than the sum of its proper divisors (30323484).

40198156 is a wasteful number, since it uses less digits than its factorization.

40198156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24984 (or 24982 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 40198156 is about 6340.2015740826. The cubic root of 40198156 is about 342.5589959999.

The spelling of 40198156 in words is "forty million, one hundred ninety-eight thousand, one hundred fifty-six".