508865490 has 120 divisors (see below), whose sum is σ = 1591800012. Its totient is φ = 116303040.

The previous prime is 508865479. The next prime is 508865491. The reversal of 508865490 is 94568805.

508865490 is a `hidden beast` number, since 508 + 8 + 6 + 54 + 90 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 450755361 + 58110129 = 21231^2 + 7623^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (508865491) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 33280 + ... + 46100.

Almost surely, 2^508865490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 508865490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795900006).

508865490 is an abundant number, since it is smaller than the sum of its proper divisors (1082934522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

508865490 is a wasteful number, since it uses less digits than its factorization.

508865490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12854 (or 12838 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 508865490 is about 22558.0471229227. The cubic root of 508865490 is about 798.3640997766.

The spelling of 508865490 in words is "five hundred eight million, eight hundred sixty-five thousand, four hundred ninety".