40778878 has 24 divisors (see below), whose sum is σ = 72817272. Its totient is φ = 17068464.

The previous prime is 40778873. The next prime is 40778923. The reversal of 40778878 is 87887704.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40778873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 625 + ... + 9052.

It is an arithmetic number, because the mean of its divisors is an integer number (3034053).

Almost surely, 2^40778878 is an apocalyptic number.

40778878 is a deficient number, since it is larger than the sum of its proper divisors (32038394).

40778878 is a wasteful number, since it uses less digits than its factorization.

40778878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9736 (or 9729 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 49.

The square root of 40778878 is about 6385.8341663404. The cubic root of 40778878 is about 344.2007065186.

The spelling of 40778878 in words is "forty million, seven hundred seventy-eight thousand, eight hundred seventy-eight".