505145420 has 48 divisors (see below), whose sum is σ = 1170294048. Its totient is φ = 181962240.

The previous prime is 505145413. The next prime is 505145477. The reversal of 505145420 is 24541505.

It is a super-3 number, since 3×505145420³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 505145420.

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, 13034 + ... + 34353.

It is an arithmetic number, because the mean of its divisors is an integer number (24381126).

Almost surely, 2^505145420 is an apocalyptic number.

It is an amenable number.

505145420 is an abundant number, since it is smaller than the sum of its proper divisors (665148628).

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

505145420 is a wasteful number, since it uses less digits than its factorization.

505145420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47450 (or 47448 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 505145420 is about 22475.4403738837. The cubic root of 505145420 is about 796.4138547231.

Adding to 505145420 its reverse (24541505), we get a palindrome (529686925).

The spelling of 505145420 in words is "five hundred five million, one hundred forty-five thousand, four hundred twenty".