2187851040 has 384 divisors, whose sum is σ = 8378173440. Its totient is φ = 531394560.

The previous prime is 2187851027. The next prime is 2187851041. The reversal of 2187851040 is 401587812.

2187851040 is a `hidden beast` number, since 21 + 87 + 8 + 510 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2187850986 and 2187851004.

It is not an unprimeable number, because it can be changed into a prime (2187851041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70575825 + ... + 70575855.

It is an arithmetic number, because the mean of its divisors is an integer number (21818160).

Almost surely, 2^2187851040 is an apocalyptic number.

2187851040 is a gapful number since it is divisible by the number (20) 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 2187851040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4189086720).

2187851040 is an abundant number, since it is smaller than the sum of its proper divisors (6190322400).

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

2187851040 is an equidigital number, since it uses as much as digits as its factorization.

2187851040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 2187851040 is about 46774.4699595837. The cubic root of 2187851040 is about 1298.1929607251.

The spelling of 2187851040 in words is "two billion, one hundred eighty-seven million, eight hundred fifty-one thousand, forty".