505299988 has 6 divisors (see below), whose sum is σ = 884274986. Its totient is φ = 252649992.

The previous prime is 505299983. The next prime is 505299989. The reversal of 505299988 is 889992505.

It can be written as a sum of positive squares in only one way, i.e., 342176004 + 163123984 = 18498^2 + 12772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505299983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63162495 + ... + 63162502.

Almost surely, 2^505299988 is an apocalyptic number.

It is an amenable number.

505299988 is a deficient number, since it is larger than the sum of its proper divisors (378974998).

505299988 is a wasteful number, since it uses less digits than its factorization.

505299988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126325001 (or 126324999 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 55.

The square root of 505299988 is about 22478.8787086901. The cubic root of 505299988 is about 796.4950772373.

The spelling of 505299988 in words is "five hundred five million, two hundred ninety-nine thousand, nine hundred eighty-eight".