40431357 has 6 divisors (see below), whose sum is σ = 58400862. Its totient is φ = 26954232.

The previous prime is 40431337. The next prime is 40431359. The reversal of 40431357 is 75313404.

It can be written as a sum of positive squares in only one way, i.e., 23242041 + 17189316 = 4821^2 + 4146^2 .

It is not a de Polignac number, because 40431357 - 2¹⁴ = 40414973 is a prime.

It is a super-2 number, since 2×40431357² = 3269389257722898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40431357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40431359) 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 5 ways as a sum of consecutive naturals, for example, 2246178 + ... + 2246195.

It is an arithmetic number, because the mean of its divisors is an integer number (9733477).

Almost surely, 2^40431357 is an apocalyptic number.

It is an amenable number.

40431357 is a deficient number, since it is larger than the sum of its proper divisors (17969505).

40431357 is a wasteful number, since it uses less digits than its factorization.

40431357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492379 (or 4492376 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 40431357 is about 6358.5656401424. The cubic root of 40431357 is about 343.2201467056.

The spelling of 40431357 in words is "forty million, four hundred thirty-one thousand, three hundred fifty-seven".