40261664 has 12 divisors (see below), whose sum is σ = 79265214. Its totient is φ = 20130816.

The previous prime is 40261651. The next prime is 40261679. The reversal of 40261664 is 46616204.

It can be written as a sum of positive squares in only one way, i.e., 39589264 + 672400 = 6292^2 + 820^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629057 + ... + 629120.

Almost surely, 2^40261664 is an apocalyptic number.

It is an amenable number.

40261664 is a deficient number, since it is larger than the sum of its proper divisors (39003550).

40261664 is a wasteful number, since it uses less digits than its factorization.

40261664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258187 (or 1258179 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40261664 is about 6345.2079556150. The cubic root of 40261664 is about 342.7393010362.

Adding to 40261664 its reverse (46616204), we get a palindrome (86877868).

The spelling of 40261664 in words is "forty million, two hundred sixty-one thousand, six hundred sixty-four".