40496991 has 8 divisors (see below), whose sum is σ = 54026544. Its totient is φ = 26982720.

The previous prime is 40496987. The next prime is 40497001. The reversal of 40496991 is 19969404.

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

It is not a de Polignac number, because 40496991 - 2² = 40496987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40496791) 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, 5901 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (6753318).

Almost surely, 2^40496991 is an apocalyptic number.

40496991 is a deficient number, since it is larger than the sum of its proper divisors (13529553).

40496991 is a wasteful number, since it uses less digits than its factorization.

40496991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 40496991 is about 6363.7246169205. The cubic root of 40496991 is about 343.4057677525.

The spelling of 40496991 in words is "forty million, four hundred ninety-six thousand, nine hundred ninety-one".