508740981 has 24 divisors (see below), whose sum is σ = 794397600. Its totient is φ = 288745632.

The previous prime is 508740977. The next prime is 508741003. The reversal of 508740981 is 189047805.

It is not a de Polignac number, because 508740981 - 2² = 508740977 is a prime.

It is a super-2 number, since 2×508740981² = 517634771497684722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508740901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10290 + ... + 33516.

It is an arithmetic number, because the mean of its divisors is an integer number (33099900).

Almost surely, 2^508740981 is an apocalyptic number.

It is an amenable number.

508740981 is a deficient number, since it is larger than the sum of its proper divisors (285656619).

508740981 is a wasteful number, since it uses less digits than its factorization.

508740981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23393 (or 23386 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 508740981 is about 22555.2872072160. The cubic root of 508740981 is about 798.2989799980.

The spelling of 508740981 in words is "five hundred eight million, seven hundred forty thousand, nine hundred eighty-one".