1628745 has 16 divisors (see below), whose sum is σ = 2719872. Its totient is φ = 830720.

The previous prime is 1628729. The next prime is 1628747. The reversal of 1628745 is 5478261.

It is not a de Polignac number, because 1628745 - 2⁴ = 1628729 is a prime.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1628747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2016 + ... + 2705.

It is an arithmetic number, because the mean of its divisors is an integer number (169992).

2^1628745 is an apocalyptic number.

1628745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1628745 is a deficient number, since it is larger than the sum of its proper divisors (1091127).

1628745 is a wasteful number, since it uses less digits than its factorization.

1628745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752.

The product of its digits is 13440, while the sum is 33.

The square root of 1628745 is about 1276.2229429061. Note that the first 3 decimals coincide. The cubic root of 1628745 is about 117.6569804623.

The spelling of 1628745 in words is "one million, six hundred twenty-eight thousand, seven hundred forty-five".