1672646404 has 75 divisors (see below), whose sum is σ = 3488133635. Its totient is φ = 701809680.

The previous prime is 1672646389. The next prime is 1672646407. The reversal of 1672646404 is 4046462761.

The square root of 1672646404 is 40898.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 829324804 + 843321600 = 28798^2 + 29040^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=4, B=143.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672646407) by changing a digit.

It is a polite number, since it can be written in 24 ways as a sum of consecutive naturals, for example, 128665102 + ... + 128665114.

Almost surely, 2^1672646404 is an apocalyptic number.

1672646404 is the 40898-th square number.

It is an amenable number.

1672646404 is an abundant number, since it is smaller than the sum of its proper divisors (1815487231).

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

1672646404 is an frugal number, since it uses more digits than its factorization.

1672646404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The cubic root of 1672646404 is about 1187.0473615843.

The spelling of 1672646404 in words is "one billion, six hundred seventy-two million, six hundred forty-six thousand, four hundred four".