40193491 has 8 divisors (see below), whose sum is σ = 45831744. Its totient is φ = 34919040.

The previous prime is 40193479. The next prime is 40193509. The reversal of 40193491 is 19439104.

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

It is not a de Polignac number, because 40193491 - 2¹¹ = 40191443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40193401) 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, 90715 + ... + 91156.

It is an arithmetic number, because the mean of its divisors is an integer number (5728968).

Almost surely, 2^40193491 is an apocalyptic number.

40193491 is a deficient number, since it is larger than the sum of its proper divisors (5638253).

40193491 is a wasteful number, since it uses less digits than its factorization.

40193491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181901.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 40193491 is about 6339.8336728971. The cubic root of 40193491 is about 342.5457441521.

The spelling of 40193491 in words is "forty million, one hundred ninety-three thousand, four hundred ninety-one".