40449431 has 8 divisors (see below), whose sum is σ = 44210064. Its totient is φ = 36702720.

The previous prime is 40449421. The next prime is 40449491. The reversal of 40449431 is 13494404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40449431 is a prime.

It is a super-2 number, since 2×40449431² = 3272312936447522, 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 = 40449394 and 40449403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40449401) 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, 3161 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (5526258).

Almost surely, 2^40449431 is an apocalyptic number.

40449431 is a deficient number, since it is larger than the sum of its proper divisors (3760633).

40449431 is a wasteful number, since it uses less digits than its factorization.

40449431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40449431 is about 6359.9867138226. The cubic root of 40449431 is about 343.2712822372.

The spelling of 40449431 in words is "forty million, four hundred forty-nine thousand, four hundred thirty-one".