1667980928 has 16 divisors (see below), whose sum is σ = 3322931010. Its totient is φ = 833990400.

The previous prime is 1667980921. The next prime is 1667980931. The reversal of 1667980928 is 8290897661.

It can be written as a sum of positive squares in only one way, i.e., 1580221504 + 87759424 = 39752^2 + 9368^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (1667980921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515423 + ... + 6515678.

Almost surely, 2^1667980928 is an apocalyptic number.

It is an amenable number.

1667980928 is a deficient number, since it is larger than the sum of its proper divisors (1654950082).

1667980928 is an equidigital number, since it uses as much as digits as its factorization.

1667980928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031115 (or 13031103 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 1667980928 is about 40840.9222226923. The cubic root of 1667980928 is about 1185.9426654382.

The spelling of 1667980928 in words is "one billion, six hundred sixty-seven million, nine hundred eighty thousand, nine hundred twenty-eight".