505747208 has 12 divisors (see below), whose sum is σ = 948395295. Its totient is φ = 252841800.

The previous prime is 505747199. The next prime is 505747223. The reversal of 505747208 is 802747505.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 252873604 + 252873604 = 15902^2 + 15902^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=15902.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 59633 + ... + 67583.

Almost surely, 2^505747208 is an apocalyptic number.

It is an amenable number.

505747208 is a deficient number, since it is larger than the sum of its proper divisors (442648087).

505747208 is an frugal number, since it uses more digits than its factorization.

505747208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15908 (or 7953 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 505747208 is about 22488.8240688570. The cubic root of 505747208 is about 796.7299895007.

The spelling of 505747208 in words is "five hundred five million, seven hundred forty-seven thousand, two hundred eight".