1861725312 has 96 divisors (see below), whose sum is σ = 5382074880. Its totient is φ = 617707008.

The previous prime is 1861725287. The next prime is 1861725361. The reversal of 1861725312 is 2135271681.

1861725312 is a `hidden beast` number, since 1 + 8 + 617 + 2 + 5 + 31 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1861725312² = 6932042274682994688, which contains 22 as substring.

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

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, 253273 + ... + 260519.

It is an arithmetic number, because the mean of its divisors is an integer number (56063280).

Almost surely, 2^1861725312 is an apocalyptic number.

1861725312 is a gapful number since it is divisible by the number (12) 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 1861725312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2691037440).

1861725312 is an abundant number, since it is smaller than the sum of its proper divisors (3520349568).

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

1861725312 is a wasteful number, since it uses less digits than its factorization.

1861725312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490 (or 7475 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1861725312 is about 43147.7150264067. The cubic root of 1861725312 is about 1230.1890805892.

Adding to 1861725312 its reverse (2135271681), we get a palindrome (3996996993).

The spelling of 1861725312 in words is "one billion, eight hundred sixty-one million, seven hundred twenty-five thousand, three hundred twelve".