40343778 has 16 divisors (see below), whose sum is σ = 89652960. Its totient is φ = 13447908.

The previous prime is 40343767. The next prime is 40343837. The reversal of 40343778 is 87734304.

40343778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 373500 + ... + 373607.

It is an arithmetic number, because the mean of its divisors is an integer number (5603310).

Almost surely, 2^40343778 is an apocalyptic number.

40343778 is an abundant number, since it is smaller than the sum of its proper divisors (49309182).

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

40343778 is a wasteful number, since it uses less digits than its factorization.

40343778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747118 (or 747112 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 40343778 is about 6351.6752120996. The cubic root of 40343778 is about 342.9721493648.

The spelling of 40343778 in words is "forty million, three hundred forty-three thousand, seven hundred seventy-eight".