40778628 has 24 divisors (see below), whose sum is σ = 103800480. Its totient is φ = 12357120.

The previous prime is 40778623. The next prime is 40778651. The reversal of 40778628 is 82687704.

40778628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40778628.

It is not an unprimeable number, because it can be changed into a prime (40778623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154333 + ... + 154596.

It is an arithmetic number, because the mean of its divisors is an integer number (4325020).

Almost surely, 2^40778628 is an apocalyptic number.

It is an amenable number.

40778628 is an abundant number, since it is smaller than the sum of its proper divisors (63021852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40778628 is a wasteful number, since it uses less digits than its factorization.

40778628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308947 (or 308945 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 40778628 is about 6385.8145917338. The cubic root of 40778628 is about 344.2000031287.

The spelling of 40778628 in words is "forty million, seven hundred seventy-eight thousand, six hundred twenty-eight".