1628672 has 20 divisors (see below), whose sum is σ = 3255186. Its totient is φ = 814080.

The previous prime is 1628633. The next prime is 1628689. The reversal of 1628672 is 2768261.

It can be written as a sum of positive squares in only one way, i.e., 1597696 + 30976 = 1264^2 + 176^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079 + ... + 2102.

2^1628672 is an apocalyptic number.

It is an amenable number.

1628672 is a deficient number, since it is larger than the sum of its proper divisors (1626514).

1628672 is an frugal number, since it uses more digits than its factorization.

1628672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199 (or 3183 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 1628672 is about 1276.1943425670. The cubic root of 1628672 is about 117.6552226492.

The spelling of 1628672 in words is "one million, six hundred twenty-eight thousand, six hundred seventy-two".