40385478 has 32 divisors (see below), whose sum is σ = 92574720. Its totient is φ = 11505600.

The previous prime is 40385473. The next prime is 40385519. The reversal of 40385478 is 87458304.

40385478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40385473) 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 15 ways as a sum of consecutive naturals, for example, 16003 + ... + 18353.

It is an arithmetic number, because the mean of its divisors is an integer number (2892960).

Almost surely, 2^40385478 is an apocalyptic number.

40385478 is an abundant number, since it is smaller than the sum of its proper divisors (52189242).

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

40385478 is a wasteful number, since it uses less digits than its factorization.

40385478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 40385478 is about 6354.9569628755. The cubic root of 40385478 is about 343.0902759145.

The spelling of 40385478 in words is "forty million, three hundred eighty-five thousand, four hundred seventy-eight".