1677991328 has 24 divisors (see below), whose sum is σ = 3557665188. Its totient is φ = 774457344.

The previous prime is 1677991319. The next prime is 1677991333. The reversal of 1677991328 is 8231997761.

It can be written as a sum of positive squares in 2 ways, for example, as 1611861904 + 66129424 = 40148^2 + 8132^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1677991328.

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, 2016401 + ... + 2017232.

Almost surely, 2^1677991328 is an apocalyptic number.

It is an amenable number.

1677991328 is an abundant number, since it is smaller than the sum of its proper divisors (1879673860).

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

1677991328 is a wasteful number, since it uses less digits than its factorization.

1677991328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033656 (or 4033648 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 53.

The square root of 1677991328 is about 40963.2924457983. The cubic root of 1677991328 is about 1188.3104163004.

The spelling of 1677991328 in words is "one billion, six hundred seventy-seven million, nine hundred ninety-one thousand, three hundred twenty-eight".