1886216640 has 896 divisors, whose sum is σ = 8427110400. Its totient is φ = 345047040.

The previous prime is 1886216627. The next prime is 1886216641. The reversal of 1886216640 is 466126881.

1886216640 = 323² + 324² + ... + 1785².

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1886216592 and 1886216601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1886216641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23876121 + ... + 23876199.

Almost surely, 2^1886216640 is an apocalyptic number.

1886216640 is a gapful number since it is divisible by the number (10) 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 1886216640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4213555200).

1886216640 is an abundant number, since it is smaller than the sum of its proper divisors (6540893760).

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

1886216640 is a wasteful number, since it uses less digits than its factorization.

1886216640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1886216640 is about 43430.5956671101. The cubic root of 1886216640 is about 1235.5600491146.

The spelling of 1886216640 in words is "one billion, eight hundred eighty-six million, two hundred sixteen thousand, six hundred forty".