40442934978 has 24 divisors (see below), whose sum is σ = 88529727468. Its totient is φ = 13341998592.

The previous prime is 40442934977. The next prime is 40442934979. The reversal of 40442934978 is 87943924404.

40442934978 is a `hidden beast` number, since 4 + 0 + 442 + 93 + 49 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (40442934977) and next prime (40442934979).

It can be written as a sum of positive squares in 2 ways, for example, as 38989266849 + 1453668129 = 197457^2 + 38127^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40442934977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11579851 + ... + 11583342.

Almost surely, 2^40442934978 is an apocalyptic number.

40442934978 is an abundant number, since it is smaller than the sum of its proper divisors (48086792490).

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

40442934978 is a wasteful number, since it uses less digits than its factorization.

40442934978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23163298 (or 23163295 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 40442934978 in words is "forty billion, four hundred forty-two million, nine hundred thirty-four thousand, nine hundred seventy-eight".