40491351 has 12 divisors (see below), whose sum is σ = 59145840. Its totient is φ = 26690400.

The previous prime is 40491349. The next prime is 40491377. The reversal of 40491351 is 15319404.

It is not a de Polignac number, because 40491351 - 2¹ = 40491349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40491391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24475 + ... + 26076.

It is an arithmetic number, because the mean of its divisors is an integer number (4928820).

Almost surely, 2^40491351 is an apocalyptic number.

40491351 is a deficient number, since it is larger than the sum of its proper divisors (18654489).

40491351 is a wasteful number, since it uses less digits than its factorization.

40491351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50646 (or 50643 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 40491351 is about 6363.2814647790. The cubic root of 40491351 is about 343.3898250170.

The spelling of 40491351 in words is "forty million, four hundred ninety-one thousand, three hundred fifty-one".