1861134004 has 12 divisors (see below), whose sum is σ = 3257474724. Its totient is φ = 930426944.

The previous prime is 1861134001. The next prime is 1861134019. The reversal of 1861134004 is 4004311681.

It can be written as a sum of positive squares in 2 ways, for example, as 608115600 + 1253018404 = 24660^2 + 35398^2 .

It is a super-3 number, since 3×1861134004³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861134001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1567 + ... + 61030.

It is an arithmetic number, because the mean of its divisors is an integer number (271456227).

Almost surely, 2^1861134004 is an apocalyptic number.

It is an amenable number.

1861134004 is a deficient number, since it is larger than the sum of its proper divisors (1396340720).

1861134004 is a wasteful number, since it uses less digits than its factorization.

1861134004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70034 (or 70032 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1861134004 is about 43140.8623465039. The cubic root of 1861134004 is about 1230.0588254854.

Adding to 1861134004 its reverse (4004311681), we get a palindrome (5865445685).

The spelling of 1861134004 in words is "one billion, eight hundred sixty-one million, one hundred thirty-four thousand, four".