40139911 has 8 divisors (see below), whose sum is σ = 46046880. Its totient is φ = 34276128.

The previous prime is 40139893. The next prime is 40139917. The reversal of 40139911 is 11993104.

40139911 = 2584² + 2585² + ... + 2589².

It is a happy number.

40139911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40139911 - 2¹¹ = 40137863 is a prime.

It is a super-2 number, since 2×40139911² = 3222424910175842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40139911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40139917) 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, 8776 + ... + 12541.

It is an arithmetic number, because the mean of its divisors is an integer number (5755860).

Almost surely, 2^40139911 is an apocalyptic number.

40139911 is a deficient number, since it is larger than the sum of its proper divisors (5906969).

40139911 is a wasteful number, since it uses less digits than its factorization.

40139911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21593.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 40139911 is about 6335.6066007921. The cubic root of 40139911 is about 342.3934660760.

It can be divided in two parts, 4013 and 9911, that added together give a square (13924 = 118²).

The spelling of 40139911 in words is "forty million, one hundred thirty-nine thousand, nine hundred eleven".