40002194 has 8 divisors (see below), whose sum is σ = 62072460. Its totient is φ = 19311376.

The previous prime is 40002191. The next prime is 40002197. The reversal of 40002194 is 49120004.

It is an interprime number because it is at equal distance from previous prime (40002191) and next prime (40002197).

It can be written as a sum of positive squares in 2 ways, for example, as 39853969 + 148225 = 6313^2 + 385^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40002191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344789 + ... + 344904.

Almost surely, 2^40002194 is an apocalyptic number.

40002194 is a deficient number, since it is larger than the sum of its proper divisors (22070266).

40002194 is a wasteful number, since it uses less digits than its factorization.

40002194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689724.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40002194 is about 6324.7287688880. The cubic root of 40002194 is about 342.0014420331.

Adding to 40002194 its reverse (49120004), we get a palindrome (89122198).

The spelling of 40002194 in words is "forty million, two thousand, one hundred ninety-four".