40815560 has 16 divisors (see below), whose sum is σ = 91835100. Its totient is φ = 16326208.

The previous prime is 40815517. The next prime is 40815569. The reversal of 40815560 is 6551804.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37136836 + 3678724 = 6094^2 + 1918^2 .

It is a super-2 number, since 2×40815560² = 3331819876227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40815569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510155 + ... + 510234.

Almost surely, 2^40815560 is an apocalyptic number.

40815560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40815560 is an abundant number, since it is smaller than the sum of its proper divisors (51019540).

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

40815560 is a wasteful number, since it uses less digits than its factorization.

40815560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020400 (or 1020396 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 40815560 is about 6388.7056592083. The cubic root of 40815560 is about 344.3038823700.

The spelling of 40815560 in words is "forty million, eight hundred fifteen thousand, five hundred sixty".