1671628 has 24 divisors (see below), whose sum is σ = 3370752. Its totient is φ = 710544.

The previous prime is 1671619. The next prime is 1671629. The reversal of 1671628 is 8261761.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1671628.

It is not an unprimeable number, because it can be changed into a prime (1671629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6225 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (140448).

2^1671628 is an apocalyptic number.

It is an amenable number.

1671628 is an abundant number, since it is smaller than the sum of its proper divisors (1699124).

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

1671628 is a wasteful number, since it uses less digits than its factorization.

1671628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 499 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 1671628 is about 1292.9145370054. The cubic root of 1671628 is about 118.6806398280.

The spelling of 1671628 in words is "one million, six hundred seventy-one thousand, six hundred twenty-eight".