40642170 has 32 divisors (see below), whose sum is σ = 97709760. Its totient is φ = 10819200.

The previous prime is 40642157. The next prime is 40642177. The reversal of 40642170 is 7124604.

40642170 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 a self number, because there is not a number n which added to its sum of digits gives 40642170.

It is not an unprimeable number, because it can be changed into a prime (40642177) 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 15 ways as a sum of consecutive naturals, for example, 30886 + ... + 32174.

It is an arithmetic number, because the mean of its divisors is an integer number (3053430).

Almost surely, 2^40642170 is an apocalyptic number.

40642170 is an abundant number, since it is smaller than the sum of its proper divisors (57067590).

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

40642170 is a wasteful number, since it uses less digits than its factorization.

40642170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 40642170 is about 6375.1211753189. The cubic root of 40642170 is about 343.8156405778.

Adding to 40642170 its reverse (7124604), we get a palindrome (47766774).

The spelling of 40642170 in words is "forty million, six hundred forty-two thousand, one hundred seventy".