40455220 has 36 divisors (see below), whose sum is σ = 92001420. Its totient is φ = 14936064.

The previous prime is 40455193. The next prime is 40455221. The reversal of 40455220 is 2255404.

It can be written as a sum of positive squares in 6 ways, for example, as 16990884 + 23464336 = 4122^2 + 4844^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40455191 and 40455200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40455221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2605 + ... + 9364.

It is an arithmetic number, because the mean of its divisors is an integer number (2555595).

Almost surely, 2^40455220 is an apocalyptic number.

It is an amenable number.

40455220 is an abundant number, since it is smaller than the sum of its proper divisors (51546200).

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

40455220 is a wasteful number, since it uses less digits than its factorization.

40455220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004 (or 11989 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 40455220 is about 6360.4418085539. The cubic root of 40455220 is about 343.2876574379.

The spelling of 40455220 in words is "forty million, four hundred fifty-five thousand, two hundred twenty".