40768641 has 24 divisors (see below), whose sum is σ = 59991360. Its totient is φ = 26676000.

The previous prime is 40768631. The next prime is 40768643. The reversal of 40768641 is 14686704.

40768641 is a `hidden beast` number, since 4 + 0 + 7 + 6 + 8 + 641 = 666.

It is not a de Polignac number, because 40768641 - 2¹³ = 40760449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40768596 and 40768605.

It is not an unprimeable number, because it can be changed into a prime (40768643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177915 + ... + 178143.

It is an arithmetic number, because the mean of its divisors is an integer number (2499640).

Almost surely, 2^40768641 is an apocalyptic number.

It is an amenable number.

40768641 is a deficient number, since it is larger than the sum of its proper divisors (19222719).

40768641 is a wasteful number, since it uses less digits than its factorization.

40768641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40768641 is about 6385.0325762677. The cubic root of 40768641 is about 344.1719017574.

The spelling of 40768641 in words is "forty million, seven hundred sixty-eight thousand, six hundred forty-one".