40778892 has 144 divisors (see below), whose sum is σ = 131668992. Its totient is φ = 10333440.

The previous prime is 40778873. The next prime is 40778923. The reversal of 40778892 is 29887704.

40778892 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 47 ways as a sum of consecutive naturals, for example, 130128 + ... + 130440.

It is an arithmetic number, because the mean of its divisors is an integer number (914368).

Almost surely, 2^40778892 is an apocalyptic number.

40778892 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40778892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65834496).

40778892 is an abundant number, since it is smaller than the sum of its proper divisors (90890100).

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

40778892 is a wasteful number, since it uses less digits than its factorization.

40778892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 40778892 is about 6385.8352625166. The cubic root of 40778892 is about 344.2007459083.

The spelling of 40778892 in words is "forty million, seven hundred seventy-eight thousand, eight hundred ninety-two".