40191983 has 8 divisors (see below), whose sum is σ = 43333248. Its totient is φ = 37057824.

The previous prime is 40191937. The next prime is 40192037. The reversal of 40191983 is 38919104.

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

It is a cyclic number.

It is not a de Polignac number, because 40191983 - 2¹⁶ = 40126447 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 (40193983) 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, 19385 + ... + 21357.

It is an arithmetic number, because the mean of its divisors is an integer number (5416656).

Almost surely, 2^40191983 is an apocalyptic number.

40191983 is a deficient number, since it is larger than the sum of its proper divisors (3141265).

40191983 is a wasteful number, since it uses less digits than its factorization.

40191983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 40191983 is about 6339.7147412167. The cubic root of 40191983 is about 342.5414601629.

The spelling of 40191983 in words is "forty million, one hundred ninety-one thousand, nine hundred eighty-three".