40808844040 has 16 divisors (see below), whose sum is σ = 91819899180. Its totient is φ = 16323537600.

The previous prime is 40808844031. The next prime is 40808844067. The reversal of 40808844040 is 4044880804.

It can be written as a sum of positive squares in 2 ways, for example, as 39403044004 + 1405800036 = 198502^2 + 37494^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1020221101 = 40808844040 / (4 + 0 + 8 + 0 + 8 + 8 + 4 + 4 + 0 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 40808843984 and 40808844002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510110511 + ... + 510110590.

Almost surely, 2^40808844040 is an apocalyptic number.

40808844040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40808844040 is an abundant number, since it is smaller than the sum of its proper divisors (51011055140).

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

40808844040 is a wasteful number, since it uses less digits than its factorization.

40808844040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020221112 (or 1020221108 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The spelling of 40808844040 in words is "forty billion, eight hundred eight million, eight hundred forty-four thousand, forty".