40647651 has 12 divisors (see below), whose sum is σ = 59572296. Its totient is φ = 24634720.

The previous prime is 40647617. The next prime is 40647667. The reversal of 40647651 is 15674604.

It is not a de Polignac number, because 40647651 - 2⁶ = 40647587 is a prime.

It is a Smith number, since the sum of its digits (33) 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 (33).

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, 55626 + ... + 56351.

It is an arithmetic number, because the mean of its divisors is an integer number (4964358).

Almost surely, 2^40647651 is an apocalyptic number.

40647651 is a deficient number, since it is larger than the sum of its proper divisors (18924645).

40647651 is a wasteful number, since it uses less digits than its factorization.

40647651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112002 (or 111991 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 40647651 is about 6375.5510350087. The cubic root of 40647651 is about 343.8310955336.

The spelling of 40647651 in words is "forty million, six hundred forty-seven thousand, six hundred fifty-one".