2133556728 has 64 divisors (see below), whose sum is σ = 5684290560. Its totient is φ = 665782656.

The previous prime is 2133556727. The next prime is 2133556753. The reversal of 2133556728 is 8276553312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2133556728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133556727) 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, 15175 + ... + 67062.

It is an arithmetic number, because the mean of its divisors is an integer number (88817040).

Almost surely, 2^2133556728 is an apocalyptic number.

It is an amenable number.

2133556728 is an abundant number, since it is smaller than the sum of its proper divisors (3550733832).

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

2133556728 is a wasteful number, since it uses less digits than its factorization.

2133556728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82316 (or 82312 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 2133556728 is about 46190.4397900691. The cubic root of 2133556728 is about 1287.3641123182.

The spelling of 2133556728 in words is "two billion, one hundred thirty-three million, five hundred fifty-six thousand, seven hundred twenty-eight".