40647672 has 48 divisors (see below), whose sum is σ = 118558440. Its totient is φ = 12506688.

The previous prime is 40647671. The next prime is 40647683. The reversal of 40647672 is 27674604.

40647672 is a `hidden beast` number, since 4 + 0 + 647 + 6 + 7 + 2 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40647671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20778 + ... + 22649.

Almost surely, 2^40647672 is an apocalyptic number.

It is an amenable number.

40647672 is an abundant number, since it is smaller than the sum of its proper divisors (77910768).

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

40647672 is a wasteful number, since it uses less digits than its factorization.

40647672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43452 (or 43445 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 40647672 is about 6375.5526819249. The cubic root of 40647672 is about 343.8311547453.

The spelling of 40647672 in words is "forty million, six hundred forty-seven thousand, six hundred seventy-two".