40778694 has 72 divisors (see below), whose sum is σ = 100883160. Its totient is φ = 12200760.

The previous prime is 40778681. The next prime is 40778711. The reversal of 40778694 is 49687704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 516147 + ... + 516225.

It is an arithmetic number, because the mean of its divisors is an integer number (1401155).

Almost surely, 2^40778694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40778694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50441580).

40778694 is an abundant number, since it is smaller than the sum of its proper divisors (60104466).

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

40778694 is a wasteful number, since it uses less digits than its factorization.

40778694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 40778694 is about 6385.8197594357. The cubic root of 40778694 is about 344.2001888239.

The spelling of 40778694 in words is "forty million, seven hundred seventy-eight thousand, six hundred ninety-four".