505402023 has 48 divisors (see below), whose sum is σ = 828285696. Its totient is φ = 272764800.

The previous prime is 505402013. The next prime is 505402031. The reversal of 505402023 is 320204505.

It is not a de Polignac number, because 505402023 - 2⁵ = 505401991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505402013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 279723 + ... + 281523.

It is an arithmetic number, because the mean of its divisors is an integer number (17255952).

Almost surely, 2^505402023 is an apocalyptic number.

505402023 is a deficient number, since it is larger than the sum of its proper divisors (322883673).

505402023 is a wasteful number, since it uses less digits than its factorization.

505402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 505402023 is about 22481.1481690771. The cubic root of 505402023 is about 796.5486855937.

Adding to 505402023 its reverse (320204505), we get a palindrome (825606528).

The spelling of 505402023 in words is "five hundred five million, four hundred two thousand, twenty-three".