40007764 has 12 divisors (see below), whose sum is σ = 73057824. Its totient is φ = 19134104.

The previous prime is 40007729. The next prime is 40007801. The reversal of 40007764 is 46770004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217342 + ... + 217525.

It is an arithmetic number, because the mean of its divisors is an integer number (6088152).

Almost surely, 2^40007764 is an apocalyptic number.

It is an amenable number.

40007764 is a deficient number, since it is larger than the sum of its proper divisors (33050060).

40007764 is a wasteful number, since it uses less digits than its factorization.

40007764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434894 (or 434892 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 40007764 is about 6325.1690886489. The cubic root of 40007764 is about 342.0173149926.

Adding to 40007764 its reverse (46770004), we get a palindrome (86777768).

The spelling of 40007764 in words is "forty million, seven thousand, seven hundred sixty-four".