1861263360 has 672 divisors, whose sum is σ = 7728581952. Its totient is φ = 424673280.

The previous prime is 1861263337. The next prime is 1861263373. The reversal of 1861263360 is 633621681.

1861263360 is a `hidden beast` number, since 1 + 8 + 6 + 12 + 633 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109486072 + ... + 109486088.

It is an arithmetic number, because the mean of its divisors is an integer number (11500866).

Almost surely, 2^1861263360 is an apocalyptic number.

1861263360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861263360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3864290976).

1861263360 is an abundant number, since it is smaller than the sum of its proper divisors (5867318592).

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

1861263360 is an equidigital number, since it uses as much as digits as its factorization.

1861263360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1861263360 is about 43142.3615487145. The cubic root of 1861263360 is about 1230.0873227713.

The spelling of 1861263360 in words is "one billion, eight hundred sixty-one million, two hundred sixty-three thousand, three hundred sixty".