40290186 has 16 divisors (see below), whose sum is σ = 82295424. Its totient is φ = 13144224.

The previous prime is 40290169. The next prime is 40290197. The reversal of 40290186 is 68109204.

40290186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 71155 + ... + 71718.

It is an arithmetic number, because the mean of its divisors is an integer number (5143464).

Almost surely, 2^40290186 is an apocalyptic number.

40290186 is an abundant number, since it is smaller than the sum of its proper divisors (42005238).

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

40290186 is a wasteful number, since it uses less digits than its factorization.

40290186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142925.

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

The square root of 40290186 is about 6347.4550805815. The cubic root of 40290186 is about 342.8202159139.

The spelling of 40290186 in words is "forty million, two hundred ninety thousand, one hundred eighty-six".