40304778 has 16 divisors (see below), whose sum is σ = 80726976. Its totient is φ = 13415360.

The previous prime is 40304777. The next prime is 40304791. The reversal of 40304778 is 87740304.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40304777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63 + ... + 8978.

It is an arithmetic number, because the mean of its divisors is an integer number (5045436).

Almost surely, 2^40304778 is an apocalyptic number.

40304778 is an abundant number, since it is smaller than the sum of its proper divisors (40422198).

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

40304778 is a wasteful number, since it uses less digits than its factorization.

40304778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 40304778 is about 6348.6044135700. The cubic root of 40304778 is about 342.8615976108.

The spelling of 40304778 in words is "forty million, three hundred four thousand, seven hundred seventy-eight".