40185649 has 8 divisors (see below), whose sum is σ = 45964800. Its totient is φ = 34416096.

The previous prime is 40185647. The next prime is 40185653. The reversal of 40185649 is 94658104.

It is a happy number.

40185649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40185649 - 2¹ = 40185647 is a prime.

It is a super-2 number, since 2×40185649² = 3229772771102402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40185647) 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 7 ways as a sum of consecutive naturals, for example, 15552 + ... + 17950.

It is an arithmetic number, because the mean of its divisors is an integer number (5745600).

Almost surely, 2^40185649 is an apocalyptic number.

It is an amenable number.

40185649 is a deficient number, since it is larger than the sum of its proper divisors (5779151).

40185649 is a wasteful number, since it uses less digits than its factorization.

40185649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 40185649 is about 6339.2151722433. The cubic root of 40185649 is about 342.5234651016.

The spelling of 40185649 in words is "forty million, one hundred eighty-five thousand, six hundred forty-nine".