1865872372 has 72 divisors (see below), whose sum is σ = 4114424160. Its totient is φ = 733844160.

The previous prime is 1865872339. The next prime is 1865872373. The reversal of 1865872372 is 2732785681.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865872373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454047 + ... + 458137.

It is an arithmetic number, because the mean of its divisors is an integer number (57144780).

Almost surely, 2^1865872372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1865872372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2057212080).

1865872372 is an abundant number, since it is smaller than the sum of its proper divisors (2248551788).

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

1865872372 is a wasteful number, since it uses less digits than its factorization.

1865872372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301 (or 4292 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 1865872372 is about 43195.7448367313. The cubic root of 1865872372 is about 1231.1018333151.

The spelling of 1865872372 in words is "one billion, eight hundred sixty-five million, eight hundred seventy-two thousand, three hundred seventy-two".