2187942456 has 64 divisors (see below), whose sum is σ = 6262375680. Its totient is φ = 624015360.

The previous prime is 2187942403. The next prime is 2187942457. The reversal of 2187942456 is 6542497812.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187942457) 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 15 ways as a sum of consecutive naturals, for example, 85651 + ... + 108221.

It is an arithmetic number, because the mean of its divisors is an integer number (97849620).

Almost surely, 2^2187942456 is an apocalyptic number.

It is an amenable number.

2187942456 is an abundant number, since it is smaller than the sum of its proper divisors (4074433224).

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

2187942456 is a wasteful number, since it uses less digits than its factorization.

2187942456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23164 (or 23160 counting only the distinct ones).

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

The square root of 2187942456 is about 46775.4471491187. The cubic root of 2187942456 is about 1298.2110414738.

The spelling of 2187942456 in words is "two billion, one hundred eighty-seven million, nine hundred forty-two thousand, four hundred fifty-six".