40139884 has 6 divisors (see below), whose sum is σ = 70244804. Its totient is φ = 20069940.

The previous prime is 40139863. The next prime is 40139887. The reversal of 40139884 is 48893104.

40139884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40139884² = 3222420575066912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40139887) 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 as a sum of consecutive naturals, namely, 5017482 + ... + 5017489.

Almost surely, 2^40139884 is an apocalyptic number.

It is an amenable number.

40139884 is a deficient number, since it is larger than the sum of its proper divisors (30104920).

40139884 is a wasteful number, since it uses less digits than its factorization.

40139884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10034975 (or 10034973 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 40139884 is about 6335.6044699776. The cubic root of 40139884 is about 342.3933893059.

The spelling of 40139884 in words is "forty million, one hundred thirty-nine thousand, eight hundred eighty-four".