40191696 has 30 divisors (see below), whose sum is σ = 112481330. Its totient is φ = 13397184.

The previous prime is 40191673. The next prime is 40191703. The reversal of 40191696 is 69619104.

It can be written as a sum of positive squares in only one way, i.e., 32901696 + 7290000 = 5736^2 + 2700^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40191696.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139411 + ... + 139698.

Almost surely, 2^40191696 is an apocalyptic number.

It is an amenable number.

40191696 is an abundant number, since it is smaller than the sum of its proper divisors (72289634).

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

40191696 is a wasteful number, since it uses less digits than its factorization.

40191696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279123 (or 279114 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 40191696 is about 6339.6921060884. The cubic root of 40191696 is about 342.5406448292.

The spelling of 40191696 in words is "forty million, one hundred ninety-one thousand, six hundred ninety-six".