505455900 has 72 divisors (see below), whose sum is σ = 1548494640. Its totient is φ = 126858240.

The previous prime is 505455871. The next prime is 505455901. The reversal of 505455900 is 9554505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505455901) 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, 44455 + ... + 54654.

It is an arithmetic number, because the mean of its divisors is an integer number (21506870).

Almost surely, 2^505455900 is an apocalyptic number.

505455900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505455900 is an abundant number, since it is smaller than the sum of its proper divisors (1043038740).

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

505455900 is a wasteful number, since it uses less digits than its factorization.

505455900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99143 (or 99136 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 505455900 is about 22482.3464077929. The cubic root of 505455900 is about 796.5769892191.

The spelling of 505455900 in words is "five hundred five million, four hundred fifty-five thousand, nine hundred".