1861348736 has 32 divisors (see below), whose sum is σ = 3993402000. Its totient is φ = 859083264.

The previous prime is 1861348733. The next prime is 1861348757. The reversal of 1861348736 is 6378431681.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861348733) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 557636 + ... + 560963.

Almost surely, 2^1861348736 is an apocalyptic number.

1861348736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1861348736 is an abundant number, since it is smaller than the sum of its proper divisors (2132053264).

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

1861348736 is a wasteful number, since it uses less digits than its factorization.

1861348736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118626 (or 1118614 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 1861348736 is about 43143.3510056880. The cubic root of 1861348736 is about 1230.1061304858.

The spelling of 1861348736 in words is "one billion, eight hundred sixty-one million, three hundred forty-eight thousand, seven hundred thirty-six".