40396139 has 8 divisors (see below), whose sum is σ = 47109600. Its totient is φ = 34624968.

The previous prime is 40396129. The next prime is 40396141. The reversal of 40396139 is 93169304.

40396139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40396139 - 2²⁰ = 39347563 is a prime.

It is a super-2 number, since 2×40396139² = 3263696092214642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40396099 and 40396108.

It is not an unprimeable number, because it can be changed into a prime (40396129) 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 in 7 ways as a sum of consecutive naturals, for example, 58544 + ... + 59229.

It is an arithmetic number, because the mean of its divisors is an integer number (5888700).

Almost surely, 2^40396139 is an apocalyptic number.

40396139 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40396139 is a deficient number, since it is larger than the sum of its proper divisors (6713461).

40396139 is an equidigital number, since it uses as much as digits as its factorization.

40396139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117794 (or 117780 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 40396139 is about 6355.7957015625. The cubic root of 40396139 is about 343.1204630329.

The spelling of 40396139 in words is "forty million, three hundred ninety-six thousand, one hundred thirty-nine".