505771440 has 40 divisors (see below), whose sum is σ = 1567892208. Its totient is φ = 134872320.

The previous prime is 505771439. The next prime is 505771457. The reversal of 505771440 is 44177505.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1053451 + ... + 1053930.

Almost surely, 2^505771440 is an apocalyptic number.

It is an amenable number.

505771440 is an abundant number, since it is smaller than the sum of its proper divisors (1062120768).

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

505771440 is a wasteful number, since it uses less digits than its factorization.

505771440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107397 (or 2107391 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 505771440 is about 22489.3628188973. The cubic root of 505771440 is about 796.7427139425.

The spelling of 505771440 in words is "five hundred five million, seven hundred seventy-one thousand, four hundred forty".