40906784 has 12 divisors (see below), whose sum is σ = 80535294. Its totient is φ = 20453376.

The previous prime is 40906769. The next prime is 40906787. The reversal of 40906784 is 48760904.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31047184 + 9859600 = 5572^2 + 3140^2 .

It is not an unprimeable number, because it can be changed into a prime (40906787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639137 + ... + 639200.

Almost surely, 2^40906784 is an apocalyptic number.

It is an amenable number.

40906784 is a deficient number, since it is larger than the sum of its proper divisors (39628510).

40906784 is a wasteful number, since it uses less digits than its factorization.

40906784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278347 (or 1278339 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 40906784 is about 6395.8411487466. The cubic root of 40906784 is about 344.5602013370.

The spelling of 40906784 in words is "forty million, nine hundred six thousand, seven hundred eighty-four".