40454991 has 8 divisors (see below), whose sum is σ = 59933360. Its totient is φ = 26969976.

The previous prime is 40454989. The next prime is 40455007. The reversal of 40454991 is 19945404.

It is a happy number.

It is not a de Polignac number, because 40454991 - 2¹ = 40454989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40454941) 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, 749140 + ... + 749193.

It is an arithmetic number, because the mean of its divisors is an integer number (7491670).

Almost surely, 2^40454991 is an apocalyptic number.

40454991 is a deficient number, since it is larger than the sum of its proper divisors (19478369).

40454991 is a wasteful number, since it uses less digits than its factorization.

40454991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498342 (or 1498336 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 40454991 is about 6360.4238066343. The cubic root of 40454991 is about 343.2870097010.

The spelling of 40454991 in words is "forty million, four hundred fifty-four thousand, nine hundred ninety-one".