40978767 has 4 divisors (see below), whose sum is σ = 54638360. Its totient is φ = 27319176.

The previous prime is 40978757. The next prime is 40978787. The reversal of 40978767 is 76787904.

40978767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-40978767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6829792 + ... + 6829797.

It is an arithmetic number, because the mean of its divisors is an integer number (13659590).

Almost surely, 2^40978767 is an apocalyptic number.

40978767 is a deficient number, since it is larger than the sum of its proper divisors (13659593).

40978767 is a wasteful number, since it uses less digits than its factorization.

40978767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13659592.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 40978767 is about 6401.4660039713. The cubic root of 40978767 is about 344.7621885592.

The spelling of 40978767 in words is "forty million, nine hundred seventy-eight thousand, seven hundred sixty-seven".