40778676 has 72 divisors (see below), whose sum is σ = 106666560. Its totient is φ = 13129344.

The previous prime is 40778651. The next prime is 40778681. The reversal of 40778676 is 67687704.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154921 + ... + 155183.

It is an arithmetic number, because the mean of its divisors is an integer number (1481480).

Almost surely, 2^40778676 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 40778676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53333280).

40778676 is an abundant number, since it is smaller than the sum of its proper divisors (65887884).

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

40778676 is a wasteful number, since it uses less digits than its factorization.

40778676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 40778676 is about 6385.8183500629. The cubic root of 40778676 is about 344.2001381798.

The spelling of 40778676 in words is "forty million, seven hundred seventy-eight thousand, six hundred seventy-six".