40107982 has 4 divisors (see below), whose sum is σ = 60161976. Its totient is φ = 20053990.

The previous prime is 40107979. The next prime is 40107989. The reversal of 40107982 is 28970104.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×40107982² = 3217300440224648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40107989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026994 + ... + 10026997.

It is an arithmetic number, because the mean of its divisors is an integer number (15040494).

Almost surely, 2^40107982 is an apocalyptic number.

40107982 is a deficient number, since it is larger than the sum of its proper divisors (20053994).

40107982 is a wasteful number, since it uses less digits than its factorization.

40107982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053993.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 40107982 is about 6333.0862934276. The cubic root of 40107982 is about 342.3026571973.

The spelling of 40107982 in words is "forty million, one hundred seven thousand, nine hundred eighty-two".