40778136 has 48 divisors (see below), whose sum is σ = 126219600. Its totient is φ = 11650752.

The previous prime is 40778131. The next prime is 40778137. The reversal of 40778136 is 63187704.

40778136 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 (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40778136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40778131) 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 11 ways as a sum of consecutive naturals, for example, 39951 + ... + 40958.

It is an arithmetic number, because the mean of its divisors is an integer number (2629575).

Almost surely, 2^40778136 is an apocalyptic number.

It is an amenable number.

40778136 is an abundant number, since it is smaller than the sum of its proper divisors (85441464).

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

40778136 is a wasteful number, since it uses less digits than its factorization.

40778136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80928 (or 80921 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 40778136 is about 6385.7760687328. The cubic root of 40778136 is about 344.1986188490.

The spelling of 40778136 in words is "forty million, seven hundred seventy-eight thousand, one hundred thirty-six".