40820478 has 16 divisors (see below), whose sum is σ = 82131840. Its totient is φ = 13525016.

The previous prime is 40820477. The next prime is 40820489. The reversal of 40820478 is 87402804.

It is a super-2 number, since 2×40820478² = 3332622848296968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40820477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19368 + ... + 21371.

It is an arithmetic number, because the mean of its divisors is an integer number (5133240).

Almost surely, 2^40820478 is an apocalyptic number.

40820478 is an abundant number, since it is smaller than the sum of its proper divisors (41311362).

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

40820478 is a wasteful number, since it uses less digits than its factorization.

40820478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40911.

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 40820478 is about 6389.0905456098. The cubic root of 40820478 is about 344.3177105807.

The spelling of 40820478 in words is "forty million, eight hundred twenty thousand, four hundred seventy-eight".