40081774 has 4 divisors (see below), whose sum is σ = 60122664. Its totient is φ = 20040886.

The previous prime is 40081763. The next prime is 40081777. The reversal of 40081774 is 47718004.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40081777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020442 + ... + 10020445.

It is an arithmetic number, because the mean of its divisors is an integer number (15030666).

Almost surely, 2^40081774 is an apocalyptic number.

40081774 is a deficient number, since it is larger than the sum of its proper divisors (20040890).

40081774 is a wasteful number, since it uses less digits than its factorization.

40081774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20040889.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 40081774 is about 6331.0168219647. The cubic root of 40081774 is about 342.2280833235.

Adding to 40081774 its reverse (47718004), we get a palindrome (87799778).

The spelling of 40081774 in words is "forty million, eighty-one thousand, seven hundred seventy-four".