1861448260 has 36 divisors (see below), whose sum is σ = 4547254572. Its totient is φ = 638210496.

The previous prime is 1861448249. The next prime is 1861448273. The reversal of 1861448260 is 628441681.

It can be written as a sum of positive squares in 2 ways, for example, as 709796164 + 1151652096 = 26642^2 + 33936^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 948739 + ... + 950698.

It is an arithmetic number, because the mean of its divisors is an integer number (126312627).

Almost surely, 2^1861448260 is an apocalyptic number.

1861448260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1861448260 is an abundant number, since it is smaller than the sum of its proper divisors (2685806312).

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

1861448260 is a wasteful number, since it uses less digits than its factorization.

1861448260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899460 (or 1899451 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 1861448260 is about 43144.5044009084. The cubic root of 1861448260 is about 1230.1280541763.

The spelling of 1861448260 in words is "one billion, eight hundred sixty-one million, four hundred forty-eight thousand, two hundred sixty".