1861374084 has 48 divisors (see below), whose sum is σ = 4549450752. Its totient is φ = 591201952.

The previous prime is 1861374071. The next prime is 1861374089. The reversal of 1861374084 is 4804731681.

It is not an unprimeable number, because it can be changed into a prime (1861374089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59767 + ... + 85409.

It is an arithmetic number, because the mean of its divisors is an integer number (94780224).

Almost surely, 2^1861374084 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 1861374084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2274725376).

1861374084 is an abundant number, since it is smaller than the sum of its proper divisors (2688076668).

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

1861374084 is a wasteful number, since it uses less digits than its factorization.

1861374084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25936 (or 25934 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1861374084 is about 43143.6447695370. The cubic root of 1861374084 is about 1230.1117143559. Note that the first 3 decimals are identical.

The spelling of 1861374084 in words is "one billion, eight hundred sixty-one million, three hundred seventy-four thousand, eighty-four".