40839140 has 12 divisors (see below), whose sum is σ = 85762236. Its totient is φ = 16335648.

The previous prime is 40839107. The next prime is 40839143. The reversal of 40839140 is 4193804.

It can be written as a sum of positive squares in 2 ways, for example, as 5721664 + 35117476 = 2392^2 + 5926^2 .

It is not an unprimeable number, because it can be changed into a prime (40839143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020959 + ... + 1020998.

It is an arithmetic number, because the mean of its divisors is an integer number (7146853).

Almost surely, 2^40839140 is an apocalyptic number.

It is an amenable number.

40839140 is an abundant number, since it is smaller than the sum of its proper divisors (44923096).

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

40839140 is a wasteful number, since it uses less digits than its factorization.

40839140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041966 (or 2041964 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40839140 is about 6390.5508369780. The cubic root of 40839140 is about 344.3701734496.

The spelling of 40839140 in words is "forty million, eight hundred thirty-nine thousand, one hundred forty".