40529991 has 8 divisors (see below), whose sum is σ = 54956160. Its totient is φ = 26561912.

The previous prime is 40529963. The next prime is 40529999. The reversal of 40529991 is 19992504.

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

It is a cyclic number.

It is not a de Polignac number, because 40529991 - 2¹³ = 40521799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40529999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114315 + ... + 114668.

It is an arithmetic number, because the mean of its divisors is an integer number (6869520).

Almost surely, 2^40529991 is an apocalyptic number.

40529991 is a deficient number, since it is larger than the sum of its proper divisors (14426169).

40529991 is a wasteful number, since it uses less digits than its factorization.

40529991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229045.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 40529991 is about 6366.3169101137. The cubic root of 40529991 is about 343.4990200600.

The spelling of 40529991 in words is "forty million, five hundred twenty-nine thousand, nine hundred ninety-one".