505156628 has 6 divisors (see below), whose sum is σ = 884024106. Its totient is φ = 252578312.

The previous prime is 505156607. The next prime is 505156657. The reversal of 505156628 is 826651505.

It can be written as a sum of positive squares in only one way, i.e., 315488644 + 189667984 = 17762^2 + 13772^2 .

It is a junction number, because it is equal to n+sod(n) for n = 505156591 and 505156600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63144575 + ... + 63144582.

It is an arithmetic number, because the mean of its divisors is an integer number (147337351).

Almost surely, 2^505156628 is an apocalyptic number.

It is an amenable number.

505156628 is a deficient number, since it is larger than the sum of its proper divisors (378867478).

505156628 is a wasteful number, since it uses less digits than its factorization.

505156628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126289161 (or 126289159 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 505156628 is about 22475.6897113303. The cubic root of 505156628 is about 796.4197448689.

The spelling of 505156628 in words is "five hundred five million, one hundred fifty-six thousand, six hundred twenty-eight".