1861750044 has 108 divisors (see below), whose sum is σ = 5911879792. Its totient is φ = 483563520.

The previous prime is 1861750039. The next prime is 1861750057. The reversal of 1861750044 is 4400571681.

It is a happy number.

It is a super-2 number, since 2×1861750044² = 6932226452668003872, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1861749990 and 1861750008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37 + ... + 61020.

Almost surely, 2^1861750044 is an apocalyptic number.

1861750044 is a gapful number since it is divisible by the number (14) 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 1861750044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2955939896).

1861750044 is an abundant number, since it is smaller than the sum of its proper divisors (4050129748).

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

1861750044 is a wasteful number, since it uses less digits than its factorization.

1861750044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61096 (or 61080 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1861750044 is about 43148.0016223231. The cubic root of 1861750044 is about 1230.1945280276.

The spelling of 1861750044 in words is "one billion, eight hundred sixty-one million, seven hundred fifty thousand, forty-four".