40309982 has 24 divisors (see below), whose sum is σ = 65909952. Its totient is φ = 18468000.

The previous prime is 40309981. The next prime is 40309991. The reversal of 40309982 is 28990304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40309981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21482 + ... + 23282.

It is an arithmetic number, because the mean of its divisors is an integer number (2746248).

Almost surely, 2^40309982 is an apocalyptic number.

40309982 is a deficient number, since it is larger than the sum of its proper divisors (25599970).

40309982 is a wasteful number, since it uses less digits than its factorization.

40309982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 40309982 is about 6349.0142541973. The cubic root of 40309982 is about 342.8763533052.

The spelling of 40309982 in words is "forty million, three hundred nine thousand, nine hundred eighty-two".