40429831 has 8 divisors (see below), whose sum is σ = 44362080. Its totient is φ = 36615072.

The previous prime is 40429817. The next prime is 40429841. The reversal of 40429831 is 13892404.

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

It is not a de Polignac number, because 40429831 - 2⁷ = 40429703 is a prime.

It is a super-2 number, since 2×40429831² = 3269142469377122, 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 = 40429793 and 40429802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40429801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28651 + ... + 30028.

It is an arithmetic number, because the mean of its divisors is an integer number (5545260).

Almost surely, 2^40429831 is an apocalyptic number.

40429831 is a deficient number, since it is larger than the sum of its proper divisors (3932249).

40429831 is a wasteful number, since it uses less digits than its factorization.

40429831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58745.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40429831 is about 6358.4456433943. The cubic root of 40429831 is about 343.2158286006.

The spelling of 40429831 in words is "forty million, four hundred twenty-nine thousand, eight hundred thirty-one".