2143534428 has 240 divisors, whose sum is σ = 6625301760. Its totient is φ = 591722496.

The previous prime is 2143534409. The next prime is 2143534433. The reversal of 2143534428 is 8244353412.

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 = 2143534392 and 2143534401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11106300 + ... + 11106492.

It is an arithmetic number, because the mean of its divisors is an integer number (27605424).

Almost surely, 2^2143534428 is an apocalyptic number.

2143534428 is a gapful number since it is divisible by the number (28) 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 2143534428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312650880).

2143534428 is an abundant number, since it is smaller than the sum of its proper divisors (4481767332).

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

2143534428 is a wasteful number, since it uses less digits than its factorization.

2143534428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 347 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 2143534428 is about 46298.3199263213. The cubic root of 2143534428 is about 1289.3678027195.

The spelling of 2143534428 in words is "two billion, one hundred forty-three million, five hundred thirty-four thousand, four hundred twenty-eight".