1861306488 has 24 divisors (see below), whose sum is σ = 5041038600. Its totient is φ = 620435472.

The previous prime is 1861306459. The next prime is 1861306529. The reversal of 1861306488 is 8846031681.

It is a happy number.

1861306488 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12925668 + ... + 12925811.

It is an arithmetic number, because the mean of its divisors is an integer number (210043275).

Almost surely, 2^1861306488 is an apocalyptic number.

1861306488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1861306488 is an abundant number, since it is smaller than the sum of its proper divisors (3179732112).

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

1861306488 is a wasteful number, since it uses less digits than its factorization.

1861306488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25851491 (or 25851484 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1861306488 is about 43142.8613793754. The cubic root of 1861306488 is about 1230.0968236292.

The spelling of 1861306488 in words is "one billion, eight hundred sixty-one million, three hundred six thousand, four hundred eighty-eight".