1654656220 has 24 divisors (see below), whose sum is σ = 3971175264. Its totient is φ = 567310656.

The previous prime is 1654656191. The next prime is 1654656259. The reversal of 1654656220 is 226564561.

It is a self number, because there is not a number n which added to its sum of digits gives 1654656220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5909347 + ... + 5909626.

It is an arithmetic number, because the mean of its divisors is an integer number (165465636).

Almost surely, 2^1654656220 is an apocalyptic number.

1654656220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1654656220 is an abundant number, since it is smaller than the sum of its proper divisors (2316519044).

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

1654656220 is a wasteful number, since it uses less digits than its factorization.

1654656220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11818989 (or 11818987 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1654656220 is about 40677.4657519369. The cubic root of 1654656220 is about 1182.7762410231.

The spelling of 1654656220 in words is "one billion, six hundred fifty-four million, six hundred fifty-six thousand, two hundred twenty".