654131340 has 72 divisors (see below), whose sum is σ = 1988754768. Its totient is φ = 174034560.

The previous prime is 654131333. The next prime is 654131369. The reversal of 654131340 is 43131456.

654131340 is a `hidden beast` number, since 654 + 1 + 3 + 1 + 3 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79039 + ... + 86921.

It is an arithmetic number, because the mean of its divisors is an integer number (27621594).

Almost surely, 2^654131340 is an apocalyptic number.

654131340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654131340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994377384).

654131340 is an abundant number, since it is smaller than the sum of its proper divisors (1334623428).

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

654131340 is a wasteful number, since it uses less digits than its factorization.

654131340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8359 (or 8354 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 654131340 is about 25575.9914763827. The cubic root of 654131340 is about 868.0704760604.

Adding to 654131340 its reverse (43131456), we get a palindrome (697262796).

The spelling of 654131340 in words is "six hundred fifty-four million, one hundred thirty-one thousand, three hundred forty".