40081849 has 4 divisors (see below), whose sum is σ = 42191440. Its totient is φ = 37972260.

The previous prime is 40081831. The next prime is 40081871. The reversal of 40081849 is 94818004.

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 40081849 - 2²¹ = 37984697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40081829) 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, 1054767 + ... + 1054804.

It is an arithmetic number, because the mean of its divisors is an integer number (10547860).

Almost surely, 2^40081849 is an apocalyptic number.

It is an amenable number.

40081849 is a deficient number, since it is larger than the sum of its proper divisors (2109591).

40081849 is a wasteful number, since it uses less digits than its factorization.

40081849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109590.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 40081849 is about 6331.0227451811. The cubic root of 40081849 is about 342.2282967796.

The spelling of 40081849 in words is "forty million, eighty-one thousand, eight hundred forty-nine".