1670400328 has 8 divisors (see below), whose sum is σ = 3132000630. Its totient is φ = 835200160.

The previous prime is 1670400313. The next prime is 1670400341. The reversal of 1670400328 is 8230040761.

It can be written as a sum of positive squares in only one way, i.e., 1319287684 + 351112644 = 36322^2 + 18738^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1670400328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104400013 + ... + 104400028.

Almost surely, 2^1670400328 is an apocalyptic number.

It is an amenable number.

1670400328 is a deficient number, since it is larger than the sum of its proper divisors (1461600302).

1670400328 is a wasteful number, since it uses less digits than its factorization.

1670400328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208800047 (or 208800043 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1670400328 is about 40870.5312908947. The cubic root of 1670400328 is about 1186.5157901994.

The spelling of 1670400328 in words is "one billion, six hundred seventy million, four hundred thousand, three hundred twenty-eight".