40099641 has 16 divisors (see below), whose sum is σ = 55007424. Its totient is φ = 25972544.

The previous prime is 40099627. The next prime is 40099643. The reversal of 40099641 is 14699004.

It is not a de Polignac number, because 40099641 - 2⁷ = 40099513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40099643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15835 + ... + 18191.

It is an arithmetic number, because the mean of its divisors is an integer number (3437964).

Almost surely, 2^40099641 is an apocalyptic number.

It is an amenable number.

40099641 is a deficient number, since it is larger than the sum of its proper divisors (14907783).

40099641 is a wasteful number, since it uses less digits than its factorization.

40099641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 40099641 is about 6332.4277335000. The cubic root of 40099641 is about 342.2789267221.

The spelling of 40099641 in words is "forty million, ninety-nine thousand, six hundred forty-one".