40801778 has 16 divisors (see below), whose sum is σ = 65067840. Its totient is φ = 19134000.

The previous prime is 40801771. The next prime is 40801867. The reversal of 40801778 is 87710804.

It is a super-2 number, since 2×40801778² = 3329570175922568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40801771) 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, 1478 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (4066740).

Almost surely, 2^40801778 is an apocalyptic number.

40801778 is a deficient number, since it is larger than the sum of its proper divisors (24266062).

40801778 is a wasteful number, since it uses less digits than its factorization.

40801778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10753.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 40801778 is about 6387.6269459010. The cubic root of 40801778 is about 344.2651248447.

The spelling of 40801778 in words is "forty million, eight hundred one thousand, seven hundred seventy-eight".