40115429 has 4 divisors (see below), whose sum is σ = 40176780. Its totient is φ = 40054080.

The previous prime is 40115423. The next prime is 40115443. The reversal of 40115429 is 92451104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28569025 + 11546404 = 5345^2 + 3398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40115429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40115398 and 40115407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115423) 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, 29684 + ... + 31005.

It is an arithmetic number, because the mean of its divisors is an integer number (10044195).

Almost surely, 2^40115429 is an apocalyptic number.

It is an amenable number.

40115429 is a deficient number, since it is larger than the sum of its proper divisors (61351).

40115429 is an equidigital number, since it uses as much as digits as its factorization.

40115429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61350.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 40115429 is about 6333.6742101248. The cubic root of 40115429 is about 342.3238414272.

The spelling of 40115429 in words is "forty million, one hundred fifteen thousand, four hundred twenty-nine".