654662540 has 72 divisors (see below), whose sum is σ = 1621331712. Its totient is φ = 221356800.

The previous prime is 654662527. The next prime is 654662543. The reversal of 654662540 is 45266456.

It is a junction number, because it is equal to n+sod(n) for n = 654662494 and 654662503.

It is not an unprimeable number, because it can be changed into a prime (654662543) 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, 66965 + ... + 76115.

It is an arithmetic number, because the mean of its divisors is an integer number (22518496).

Almost surely, 2^654662540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654662540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810665856).

654662540 is an abundant number, since it is smaller than the sum of its proper divisors (966669172).

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

654662540 is a wasteful number, since it uses less digits than its factorization.

654662540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9247 (or 9238 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 654662540 is about 25586.3741081068. The cubic root of 654662540 is about 868.3053902867.

The spelling of 654662540 in words is "six hundred fifty-four million, six hundred sixty-two thousand, five hundred forty".