654631538 has 24 divisors (see below), whose sum is σ = 1089850944. Its totient is φ = 294659640.

The previous prime is 654631531. The next prime is 654631553. The reversal of 654631538 is 835136456.

It is a junction number, because it is equal to n+sod(n) for n = 654631495 and 654631504.

It is not an unprimeable number, because it can be changed into a prime (654631531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11795 + ... + 38057.

It is an arithmetic number, because the mean of its divisors is an integer number (45410456).

Almost surely, 2^654631538 is an apocalyptic number.

654631538 is a deficient number, since it is larger than the sum of its proper divisors (435219406).

654631538 is a wasteful number, since it uses less digits than its factorization.

654631538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26390 (or 26379 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 654631538 is about 25585.7682706617. The cubic root of 654631538 is about 868.2916836684.

The spelling of 654631538 in words is "six hundred fifty-four million, six hundred thirty-one thousand, five hundred thirty-eight".