40647936 has 72 divisors (see below), whose sum is σ = 123653824. Its totient is φ = 11612160.

The previous prime is 40647889. The next prime is 40647961. The reversal of 40647936 is 63974604.

It is a junction number, because it is equal to n+sod(n) for n = 40647894 and 40647903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596 + ... + 9156.

Almost surely, 2^40647936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40647936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61826912).

40647936 is an abundant number, since it is smaller than the sum of its proper divisors (83005888).

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

40647936 is an equidigital number, since it uses as much as digits as its factorization.

40647936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7587 (or 7573 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 40647936 is about 6375.5733859787. The cubic root of 40647936 is about 343.8318991194.

The spelling of 40647936 in words is "forty million, six hundred forty-seven thousand, nine hundred thirty-six".