40778408 has 64 divisors (see below), whose sum is σ = 90936000. Its totient is φ = 16954560.

The previous prime is 40778407. The next prime is 40778453. The reversal of 40778408 is 80487704.

40778408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (40778401) 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, 1406138 + ... + 1406166.

It is an arithmetic number, because the mean of its divisors is an integer number (1420875).

Almost surely, 2^40778408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40778408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45468000).

40778408 is an abundant number, since it is smaller than the sum of its proper divisors (50157592).

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

40778408 is a wasteful number, since it uses less digits than its factorization.

40778408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 40778408 is about 6385.7973660303. The cubic root of 40778408 is about 344.1993841432.

The spelling of 40778408 in words is "forty million, seven hundred seventy-eight thousand, four hundred eight".