40629839 has 4 divisors (see below), whose sum is σ = 40922280. Its totient is φ = 40337400.

The previous prime is 40629833. The next prime is 40629863. The reversal of 40629839 is 93892604.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40629839 - 2²⁰ = 39581263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40629796 and 40629805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40629833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146012 + ... + 146289.

It is an arithmetic number, because the mean of its divisors is an integer number (10230570).

Almost surely, 2^40629839 is an apocalyptic number.

40629839 is a deficient number, since it is larger than the sum of its proper divisors (292441).

40629839 is a wasteful number, since it uses less digits than its factorization.

40629839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292440.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 40629839 is about 6374.1539830789. The cubic root of 40629839 is about 343.7808653718.

The spelling of 40629839 in words is "forty million, six hundred twenty-nine thousand, eight hundred thirty-nine".