40158297 has 6 divisors (see below), whose sum is σ = 58006442. Its totient is φ = 26772192.

The previous prime is 40158269. The next prime is 40158319. The reversal of 40158297 is 79285104.

It can be written as a sum of positive squares in only one way, i.e., 23707161 + 16451136 = 4869^2 + 4056^2 .

It is not a de Polignac number, because 40158297 - 2⁷ = 40158169 is a prime.

It is a super-2 number, since 2×40158297² = 3225377635880418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40158397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2231008 + ... + 2231025.

Almost surely, 2^40158297 is an apocalyptic number.

It is an amenable number.

40158297 is a deficient number, since it is larger than the sum of its proper divisors (17848145).

40158297 is a wasteful number, since it uses less digits than its factorization.

40158297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462039 (or 4462036 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 40158297 is about 6337.0574401689. The cubic root of 40158297 is about 342.4457356266.

The spelling of 40158297 in words is "forty million, one hundred fifty-eight thousand, two hundred ninety-seven".