40505982 has 32 divisors (see below), whose sum is σ = 91428480. Its totient is φ = 11850720.

The previous prime is 40505981. The next prime is 40506001. The reversal of 40505982 is 28950504.

40505982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8668 + ... + 12495.

It is an arithmetic number, because the mean of its divisors is an integer number (2857140).

Almost surely, 2^40505982 is an apocalyptic number.

40505982 is an abundant number, since it is smaller than the sum of its proper divisors (50922498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40505982 is a wasteful number, since it uses less digits than its factorization.

40505982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21208.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 40505982 is about 6364.4310036326. The cubic root of 40505982 is about 343.4311797869.

The spelling of 40505982 in words is "forty million, five hundred five thousand, nine hundred eighty-two".