40123984 has 20 divisors (see below), whose sum is σ = 79842484. Its totient is φ = 19519488.

The previous prime is 40123949. The next prime is 40124009. The reversal of 40123984 is 48932104.

It can be written as a sum of positive squares in 2 ways, for example, as 32171584 + 7952400 = 5672^2 + 2820^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33297 + ... + 34480.

Almost surely, 2^40123984 is an apocalyptic number.

It is an amenable number.

40123984 is a deficient number, since it is larger than the sum of its proper divisors (39718500).

40123984 is a wasteful number, since it uses less digits than its factorization.

40123984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67822 (or 67816 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40123984 is about 6334.3495325092. The cubic root of 40123984 is about 342.3481743117.

The spelling of 40123984 in words is "forty million, one hundred twenty-three thousand, nine hundred eighty-four".