40491907 has 8 divisors (see below), whose sum is σ = 42681600. Its totient is φ = 38308104.

The previous prime is 40491881. The next prime is 40491911. The reversal of 40491907 is 70919404.

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

It is not a de Polignac number, because 40491907 - 2⁷ = 40491779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40491107) 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, 25194 + ... + 26752.

It is an arithmetic number, because the mean of its divisors is an integer number (5335200).

Almost surely, 2^40491907 is an apocalyptic number.

40491907 is a deficient number, since it is larger than the sum of its proper divisors (2189693).

40491907 is a wasteful number, since it uses less digits than its factorization.

40491907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 40491907 is about 6363.3251527798. The cubic root of 40491907 is about 343.3913967425.

The spelling of 40491907 in words is "forty million, four hundred ninety-one thousand, nine hundred seven".