1628772 has 12 divisors (see below), whose sum is σ = 3800496. Its totient is φ = 542920.

The previous prime is 1628747. The next prime is 1628773. The reversal of 1628772 is 2778261.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1628773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67854 + ... + 67877.

It is an arithmetic number, because the mean of its divisors is an integer number (316708).

2^1628772 is an apocalyptic number.

1628772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1628772 is an abundant number, since it is smaller than the sum of its proper divisors (2171724).

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

1628772 is a wasteful number, since it uses less digits than its factorization.

1628772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135738 (or 135736 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 1628772 is about 1276.2335209514. The cubic root of 1628772 is about 117.6576305990.

The spelling of 1628772 in words is "one million, six hundred twenty-eight thousand, seven hundred seventy-two".