40078038 has 64 divisors (see below), whose sum is σ = 107638272. Its totient is φ = 9607680.

The previous prime is 40078019. The next prime is 40078039. The reversal of 40078038 is 83087004.

40078038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40077996 and 40078014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40078039) 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 31 ways as a sum of consecutive naturals, for example, 2670 + ... + 9342.

It is an arithmetic number, because the mean of its divisors is an integer number (1681848).

Almost surely, 2^40078038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40078038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53819136).

40078038 is an abundant number, since it is smaller than the sum of its proper divisors (67560234).

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

40078038 is a wasteful number, since it uses less digits than its factorization.

40078038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6709.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 40078038 is about 6330.7217597996. The cubic root of 40078038 is about 342.2174500297.

The spelling of 40078038 in words is "forty million, seventy-eight thousand, thirty-eight".