40781336 has 16 divisors (see below), whose sum is σ = 78092640. Its totient is φ = 19956640.

The previous prime is 40781333. The next prime is 40781339. The reversal of 40781336 is 63318704.

40781336 = 1589² + 1590² + ... + 1604².

It is an interprime number because it is at equal distance from previous prime (40781333) and next prime (40781339).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781333) by changing a digit.

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, 53855 + ... + 54606.

It is an arithmetic number, because the mean of its divisors is an integer number (4880790).

Almost surely, 2^40781336 is an apocalyptic number.

It is an amenable number.

40781336 is a deficient number, since it is larger than the sum of its proper divisors (37311304).

40781336 is a wasteful number, since it uses less digits than its factorization.

40781336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108514 (or 108510 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40781336 is about 6386.0266206774. The cubic root of 40781336 is about 344.2076220950.

The spelling of 40781336 in words is "forty million, seven hundred eighty-one thousand, three hundred thirty-six".