40212736 has 18 divisors (see below), whose sum is σ = 80268902. Its totient is φ = 20106240.

The previous prime is 40212719. The next prime is 40212737. The reversal of 40212736 is 63721204.

It can be written as a sum of positive squares in only one way, i.e., 23040000 + 17172736 = 4800^2 + 4144^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40212736.

It is not an unprimeable number, because it can be changed into a prime (40212737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78285 + ... + 78796.

Almost surely, 2^40212736 is an apocalyptic number.

It is an amenable number.

40212736 is a deficient number, since it is larger than the sum of its proper divisors (40056166).

40212736 is an equidigital number, since it uses as much as digits as its factorization.

40212736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157097 (or 157083 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 40212736 is about 6341.3512755563. The cubic root of 40212736 is about 342.6004067423.

The spelling of 40212736 in words is "forty million, two hundred twelve thousand, seven hundred thirty-six".