1670533728 has 24 divisors (see below), whose sum is σ = 4385151288. Its totient is φ = 556844544.

The previous prime is 1670533717. The next prime is 1670533741. The reversal of 1670533728 is 8273350761.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1670533728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8700601 + ... + 8700792.

It is an arithmetic number, because the mean of its divisors is an integer number (182714637).

Almost surely, 2^1670533728 is an apocalyptic number.

It is an amenable number.

1670533728 is an abundant number, since it is smaller than the sum of its proper divisors (2714617560).

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

1670533728 is a wasteful number, since it uses less digits than its factorization.

1670533728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17401406 (or 17401398 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 1670533728 is about 40872.1632410128. The cubic root of 1670533728 is about 1186.5473748422.

The spelling of 1670533728 in words is "one billion, six hundred seventy million, five hundred thirty-three thousand, seven hundred twenty-eight".