2187386256 has 80 divisors (see below), whose sum is σ = 6187603968. Its totient is φ = 660355200.

The previous prime is 2187386249. The next prime is 2187386281. The reversal of 2187386256 is 6526837812.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135445 + ... + 150731.

Almost surely, 2^2187386256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2187386256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3093801984).

2187386256 is an abundant number, since it is smaller than the sum of its proper divisors (4000217712).

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

2187386256 is a wasteful number, since it uses less digits than its factorization.

2187386256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15580 (or 15574 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 2187386256 is about 46769.5013443590. The cubic root of 2187386256 is about 1298.1010254519.

The spelling of 2187386256 in words is "two billion, one hundred eighty-seven million, three hundred eighty-six thousand, two hundred fifty-six".