40001236 has 12 divisors (see below), whose sum is σ = 76366080. Its totient is φ = 18182360.

The previous prime is 40001231. The next prime is 40001249. The reversal of 40001236 is 63210004.

40001236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454516 + ... + 454603.

It is an arithmetic number, because the mean of its divisors is an integer number (6363840).

Almost surely, 2^40001236 is an apocalyptic number.

It is an amenable number.

40001236 is a deficient number, since it is larger than the sum of its proper divisors (36364844).

40001236 is a wasteful number, since it uses less digits than its factorization.

40001236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909134 (or 909132 counting only the distinct ones).

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

The square root of 40001236 is about 6324.6530339616. The cubic root of 40001236 is about 341.9987118495.

The spelling of 40001236 in words is "forty million, one thousand, two hundred thirty-six".