505772540 has 48 divisors (see below), whose sum is σ = 1307232192. Its totient is φ = 160068096.

The previous prime is 505772513. The next prime is 505772551. The reversal of 505772540 is 45277505.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 505772540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137129 + ... + 140768.

It is an arithmetic number, because the mean of its divisors is an integer number (27234004).

Almost surely, 2^505772540 is an apocalyptic number.

It is an amenable number.

505772540 is an abundant number, since it is smaller than the sum of its proper divisors (801459652).

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

505772540 is a wasteful number, since it uses less digits than its factorization.

505772540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277926 (or 277924 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 505772540 is about 22489.3872748903. The cubic root of 505772540 is about 796.7432915528.

The spelling of 505772540 in words is "five hundred five million, seven hundred seventy-two thousand, five hundred forty".