505117420 has 24 divisors (see below), whose sum is σ = 1064983248. Its totient is φ = 201240000.

The previous prime is 505117411. The next prime is 505117427. The reversal of 505117420 is 24711505.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (505117427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45291 + ... + 55330.

It is an arithmetic number, because the mean of its divisors is an integer number (44374302).

Almost surely, 2^505117420 is an apocalyptic number.

It is an amenable number.

505117420 is an abundant number, since it is smaller than the sum of its proper divisors (559865828).

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

505117420 is a wasteful number, since it uses less digits than its factorization.

505117420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100881 (or 100879 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 505117420 is about 22474.8174631075. The cubic root of 505117420 is about 796.3991394886.

Adding to 505117420 its reverse (24711505), we get a palindrome (529828925).

The spelling of 505117420 in words is "five hundred five million, one hundred seventeen thousand, four hundred twenty".