1861100148 has 48 divisors (see below), whose sum is σ = 4469540544. Its totient is φ = 602300160.

The previous prime is 1861100123. The next prime is 1861100161. The reversal of 1861100148 is 8410011681.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 213736 + ... + 222272.

It is an arithmetic number, because the mean of its divisors is an integer number (93115428).

Almost surely, 2^1861100148 is an apocalyptic number.

It is an amenable number.

1861100148 is an abundant number, since it is smaller than the sum of its proper divisors (2608440396).

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

1861100148 is a wasteful number, since it uses less digits than its factorization.

1861100148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072 (or 9070 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 1861100148 is about 43140.4699557156. The cubic root of 1861100148 is about 1230.0513667490.

The spelling of 1861100148 in words is "one billion, eight hundred sixty-one million, one hundred thousand, one hundred forty-eight".