40878368 has 12 divisors (see below), whose sum is σ = 80479350. Its totient is φ = 20439168.

The previous prime is 40878361. The next prime is 40878389. The reversal of 40878368 is 86387804.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40806544 + 71824 = 6388^2 + 268^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40878361) 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 as a sum of consecutive naturals, namely, 638693 + ... + 638756.

Almost surely, 2^40878368 is an apocalyptic number.

It is an amenable number.

40878368 is a deficient number, since it is larger than the sum of its proper divisors (39600982).

40878368 is a wasteful number, since it uses less digits than its factorization.

40878368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277459 (or 1277451 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 40878368 is about 6393.6193192901. The cubic root of 40878368 is about 344.4803996536.

The spelling of 40878368 in words is "forty million, eight hundred seventy-eight thousand, three hundred sixty-eight".