40339980 has 72 divisors (see below), whose sum is σ = 129572352. Its totient is φ = 10123776.

The previous prime is 40339979. The next prime is 40339987. The reversal of 40339980 is 8993304.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40339987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3532 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (1799616).

Almost surely, 2^40339980 is an apocalyptic number.

It is an amenable number.

40339980 is an abundant number, since it is smaller than the sum of its proper divisors (89232372).

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

40339980 is a wasteful number, since it uses less digits than its factorization.

40339980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13215 (or 13210 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 40339980 is about 6351.3762288184. The cubic root of 40339980 is about 342.9613864569.

The spelling of 40339980 in words is "forty million, three hundred thirty-nine thousand, nine hundred eighty".