40491436 has 12 divisors (see below), whose sum is σ = 72588600. Its totient is φ = 19751840.

The previous prime is 40491397. The next prime is 40491443. The reversal of 40491436 is 63419404.

It is a junction number, because it is equal to n+sod(n) for n = 40491398 and 40491407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123286 + ... + 123613.

It is an arithmetic number, because the mean of its divisors is an integer number (6049050).

Almost surely, 2^40491436 is an apocalyptic number.

It is an amenable number.

40491436 is a deficient number, since it is larger than the sum of its proper divisors (32097164).

40491436 is a wasteful number, since it uses less digits than its factorization.

40491436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246944 (or 246942 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40491436 is about 6363.2881437194. The cubic root of 40491436 is about 343.3900652997.

The spelling of 40491436 in words is "forty million, four hundred ninety-one thousand, four hundred thirty-six".