2143628280 has 64 divisors (see below), whose sum is σ = 7145431200. Its totient is φ = 571633920.

The previous prime is 2143628273. The next prime is 2143628287. The reversal of 2143628280 is 828263412.

2143628280 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 628 + 28 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2143628273) and next prime (2143628287).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143628287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991341 + ... + 993500.

Almost surely, 2^2143628280 is an apocalyptic number.

2143628280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143628280 is an abundant number, since it is smaller than the sum of its proper divisors (5001802920).

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

2143628280 is a wasteful number, since it uses less digits than its factorization.

2143628280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984861 (or 1984851 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 2143628280 is about 46299.3334725242. Note that the first 3 decimals coincide. The cubic root of 2143628280 is about 1289.3866202356.

The spelling of 2143628280 in words is "two billion, one hundred forty-three million, six hundred twenty-eight thousand, two hundred eighty".