40787747 has 24 divisors (see below), whose sum is σ = 55751472. Its totient is φ = 29332800.

The previous prime is 40787741. The next prime is 40787749. The reversal of 40787747 is 74778704.

It is not a de Polignac number, because 40787747 - 2⁴ = 40787731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40787698 and 40787707.

It is not an unprimeable number, because it can be changed into a prime (40787741) 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, 4097 + ... + 9917.

It is an arithmetic number, because the mean of its divisors is an integer number (2322978).

Almost surely, 2^40787747 is an apocalyptic number.

40787747 is a deficient number, since it is larger than the sum of its proper divisors (14963725).

40787747 is a wasteful number, since it uses less digits than its factorization.

40787747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5859 (or 5852 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 44.

The square root of 40787747 is about 6386.5285562659. The cubic root of 40787747 is about 344.2256581188.

It can be divided in two parts, 40 and 787747, that added together give a palindrome (787787).

The spelling of 40787747 in words is "forty million, seven hundred eighty-seven thousand, seven hundred forty-seven".