40199679 has 32 divisors (see below), whose sum is σ = 67919040. Its totient is φ = 23279616.

The previous prime is 40199651. The next prime is 40199689. The reversal of 40199679 is 97699104.

It is not a de Polignac number, because 40199679 - 2⁵ = 40199647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40199689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2599 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (2122470).

Almost surely, 2^40199679 is an apocalyptic number.

40199679 is a deficient number, since it is larger than the sum of its proper divisors (27719361).

40199679 is a wasteful number, since it uses less digits than its factorization.

40199679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776 (or 6770 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 40199679 is about 6340.3216795365. The cubic root of 40199679 is about 342.5633221583.

The spelling of 40199679 in words is "forty million, one hundred ninety-nine thousand, six hundred seventy-nine".