654636620 has 72 divisors (see below), whose sum is σ = 1521581712. Its totient is φ = 236396160.

The previous prime is 654636599. The next prime is 654636623. The reversal of 654636620 is 26636456.

It is not an unprimeable number, because it can be changed into a prime (654636623) 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, 379079 + ... + 380801.

Almost surely, 2^654636620 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 654636620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760790856).

654636620 is an abundant number, since it is smaller than the sum of its proper divisors (866945092).

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

654636620 is a wasteful number, since it uses less digits than its factorization.

654636620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911 (or 1898 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 654636620 is about 25585.8675834923. The cubic root of 654636620 is about 868.2939305542.

The spelling of 654636620 in words is "six hundred fifty-four million, six hundred thirty-six thousand, six hundred twenty".