40158849 has 4 divisors (see below), whose sum is σ = 53545136. Its totient is φ = 26772564.

The previous prime is 40158841. The next prime is 40158869. The reversal of 40158849 is 94885104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40158849 - 2³ = 40158841 is a prime.

It is a super-2 number, since 2×40158849² = 3225466306009602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40158841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6693139 + ... + 6693144.

It is an arithmetic number, because the mean of its divisors is an integer number (13386284).

Almost surely, 2^40158849 is an apocalyptic number.

It is an amenable number.

40158849 is a deficient number, since it is larger than the sum of its proper divisors (13386287).

40158849 is a wasteful number, since it uses less digits than its factorization.

40158849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13386286.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 40158849 is about 6337.1009933565. The cubic root of 40158849 is about 342.4473046605.

The spelling of 40158849 in words is "forty million, one hundred fifty-eight thousand, eight hundred forty-nine".