40042210 has 16 divisors (see below), whose sum is σ = 77620536. Its totient is φ = 14784768.

The previous prime is 40042187. The next prime is 40042213. The reversal of 40042210 is 1224004.

It can be written as a sum of positive squares in 4 ways, for example, as 22174681 + 17867529 = 4709^2 + 4227^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (40042213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153879 + ... + 154138.

Almost surely, 2^40042210 is an apocalyptic number.

40042210 is a deficient number, since it is larger than the sum of its proper divisors (37578326).

40042210 is a wasteful number, since it uses less digits than its factorization.

40042210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308037.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40042210 is about 6327.8914339612. The cubic root of 40042210 is about 342.1154438536.

Adding to 40042210 its reverse (1224004), we get a palindrome (41266214).

The spelling of 40042210 in words is "forty million, forty-two thousand, two hundred ten".