2261947660 has 48 divisors (see below), whose sum is σ = 5431539456. Its totient is φ = 775115712.

The previous prime is 2261947651. The next prime is 2261947687. The reversal of 2261947660 is 667491622.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 395179 + ... + 400861.

It is an arithmetic number, because the mean of its divisors is an integer number (113157072).

Almost surely, 2^2261947660 is an apocalyptic number.

2261947660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2261947660 is an abundant number, since it is smaller than the sum of its proper divisors (3169591796).

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

2261947660 is a wasteful number, since it uses less digits than its factorization.

2261947660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542 (or 8540 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 2261947660 is about 47559.9375525242. The cubic root of 2261947660 is about 1312.6859909969.

It can be divided in two parts, 22619476 and 60, that added together give a square (22619536 = 4756²).

The spelling of 2261947660 in words is "two billion, two hundred sixty-one million, nine hundred forty-seven thousand, six hundred sixty".