40820481 has 24 divisors (see below), whose sum is σ = 63783720. Its totient is φ = 25007616.

The previous prime is 40820477. The next prime is 40820489. The reversal of 40820481 is 18402804.

It can be written as a sum of positive squares in 4 ways, for example, as 3549456 + 37271025 = 1884^2 + 6105^2 .

It is not a de Polignac number, because 40820481 - 2² = 40820477 is a prime.

It is a super-2 number, since 2×40820481² = 3332623338142722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40820489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30825 + ... + 32121.

It is an arithmetic number, because the mean of its divisors is an integer number (2657655).

Almost surely, 2^40820481 is an apocalyptic number.

It is an amenable number.

40820481 is a deficient number, since it is larger than the sum of its proper divisors (22963239).

40820481 is a wasteful number, since it uses less digits than its factorization.

40820481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 40820481 is about 6389.0907803850. The cubic root of 40820481 is about 344.3177190156.

The spelling of 40820481 in words is "forty million, eight hundred twenty thousand, four hundred eighty-one".