654235490 has 32 divisors (see below), whose sum is σ = 1196642160. Its totient is φ = 257485824.

The previous prime is 654235487. The next prime is 654235499. The reversal of 654235490 is 94532456.

It can be written as a sum of positive squares in 8 ways, for example, as 352275361 + 301960129 = 18769^2 + 17377^2 .

It is not an unprimeable number, because it can be changed into a prime (654235499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405806 + ... + 407414.

Almost surely, 2^654235490 is an apocalyptic number.

654235490 is a deficient number, since it is larger than the sum of its proper divisors (542406670).

654235490 is a wasteful number, since it uses less digits than its factorization.

654235490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 654235490 is about 25578.0274845423. The cubic root of 654235490 is about 868.1165446589.

The spelling of 654235490 in words is "six hundred fifty-four million, two hundred thirty-five thousand, four hundred ninety".