40009194 has 64 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 12234240.

The previous prime is 40009169. The next prime is 40009201. The reversal of 40009194 is 49190004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37107 + ... + 38169.

It is an arithmetic number, because the mean of its divisors is an integer number (1508220).

Almost surely, 2^40009194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40009194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

40009194 is an abundant number, since it is smaller than the sum of its proper divisors (56516886).

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

40009194 is a wasteful number, since it uses less digits than its factorization.

40009194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 40009194 is about 6325.2821280952. The cubic root of 40009194 is about 342.0213898595.

Adding to 40009194 its reverse (49190004), we get a palindrome (89199198).

The spelling of 40009194 in words is "forty million, nine thousand, one hundred ninety-four".