508868381 has 6 divisors (see below), whose sum is σ = 591948990. Its totient is φ = 436172856.

The previous prime is 508868369. The next prime is 508868413. The reversal of 508868381 is 183868805.

It can be written as a sum of positive squares in only one way, i.e., 452242756 + 56625625 = 21266^2 + 7525^2 .

It is not a de Polignac number, because 508868381 - 2²² = 504674077 is a prime.

It is a super-2 number, since 2×508868381² = 517894058363122322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508868081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5192486 + ... + 5192583.

It is an arithmetic number, because the mean of its divisors is an integer number (98658165).

Almost surely, 2^508868381 is an apocalyptic number.

It is an amenable number.

508868381 is a deficient number, since it is larger than the sum of its proper divisors (83080609).

508868381 is a wasteful number, since it uses less digits than its factorization.

508868381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10385083 (or 10385076 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 508868381 is about 22558.1112019601. Note that the first 3 decimals coincide. The cubic root of 508868381 is about 798.3656116799.

The spelling of 508868381 in words is "five hundred eight million, eight hundred sixty-eight thousand, three hundred eighty-one".