40186396 has 12 divisors (see below), whose sum is σ = 72041760. Its totient is φ = 19603040.

The previous prime is 40186361. The next prime is 40186397. The reversal of 40186396 is 69368104.

It is a super-2 number, since 2×40186396² = 3229892846937632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40186397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122356 + ... + 122683.

It is an arithmetic number, because the mean of its divisors is an integer number (6003480).

Almost surely, 2^40186396 is an apocalyptic number.

It is an amenable number.

40186396 is a deficient number, since it is larger than the sum of its proper divisors (31855364).

40186396 is a wasteful number, since it uses less digits than its factorization.

40186396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245084 (or 245082 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40186396 is about 6339.2740909350. The cubic root of 40186396 is about 342.5255874467.

The spelling of 40186396 in words is "forty million, one hundred eighty-six thousand, three hundred ninety-six".