40047732 has 36 divisors (see below), whose sum is σ = 101562916. Its totient is φ = 13305600.

The previous prime is 40047731. The next prime is 40047751. The reversal of 40047732 is 23774004.

It can be written as a sum of positive squares in 2 ways, for example, as 9511056 + 30536676 = 3084^2 + 5526^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 40047696 and 40047705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40047731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10482 + ... + 13782.

Almost surely, 2^40047732 is an apocalyptic number.

It is an amenable number.

40047732 is an abundant number, since it is smaller than the sum of its proper divisors (61515184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40047732 is a wasteful number, since it uses less digits than its factorization.

40047732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648 (or 3643 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 40047732 is about 6328.3277411967. The cubic root of 40047732 is about 342.1311695478.

The spelling of 40047732 in words is "forty million, forty-seven thousand, seven hundred thirty-two".