1861602912 has 240 divisors, whose sum is σ = 5965332912. Its totient is φ = 566092800.

The previous prime is 1861602863. The next prime is 1861602937. The reversal of 1861602912 is 2192061681.

1861602912 is a `hidden beast` number, since 1 + 8 + 616 + 0 + 29 + 12 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3403023 + ... + 3403569.

Almost surely, 2^1861602912 is an apocalyptic number.

1861602912 is a gapful number since it is divisible by the number (12) 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 1861602912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2982666456).

1861602912 is an abundant number, since it is smaller than the sum of its proper divisors (4103730000).

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

1861602912 is a wasteful number, since it uses less digits than its factorization.

1861602912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1861602912 is about 43146.2966197564. The cubic root of 1861602912 is about 1230.1621202132.

The spelling of 1861602912 in words is "one billion, eight hundred sixty-one million, six hundred two thousand, nine hundred twelve".