2185787136 has 288 divisors, whose sum is σ = 6607091008. Its totient is φ = 637009920.

The previous prime is 2185787077. The next prime is 2185787143. The reversal of 2185787136 is 6317875812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22533840 + ... + 22533936.

Almost surely, 2^2185787136 is an apocalyptic number.

2185787136 is a gapful number since it is divisible by the number (26) 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 2185787136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3303545504).

2185787136 is an abundant number, since it is smaller than the sum of its proper divisors (4421303872).

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

2185787136 is a wasteful number, since it uses less digits than its factorization.

2185787136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 213 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 2185787136 is about 46752.4024623334. The cubic root of 2185787136 is about 1297.7846165622.

The spelling of 2185787136 in words is "two billion, one hundred eighty-five million, seven hundred eighty-seven thousand, one hundred thirty-six".