40131304 has 8 divisors (see below), whose sum is σ = 75246210. Its totient is φ = 20065648.

The previous prime is 40131281. The next prime is 40131307. The reversal of 40131304 is 40313104.

It can be written as a sum of positive squares in only one way, i.e., 38415204 + 1716100 = 6198^2 + 1310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40131304² = 3221043121480832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40131307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2508199 + ... + 2508214.

Almost surely, 2^40131304 is an apocalyptic number.

It is an amenable number.

40131304 is a deficient number, since it is larger than the sum of its proper divisors (35114906).

40131304 is a wasteful number, since it uses less digits than its factorization.

40131304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016419 (or 5016415 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40131304 is about 6334.9273081859. The cubic root of 40131304 is about 342.3689917548.

Adding to 40131304 its reverse (40313104), we get a palindrome (80444408).

The spelling of 40131304 in words is "forty million, one hundred thirty-one thousand, three hundred four".