1628838 has 24 divisors (see below), whose sum is σ = 3737448. Its totient is φ = 510912.

The previous prime is 1628801. The next prime is 1628839. The reversal of 1628838 is 8388261.

It is a super-2 number, since 2×1628838² = 5306226460488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2356 + ... + 2967.

It is an arithmetic number, because the mean of its divisors is an integer number (155727).

2^1628838 is an apocalyptic number.

1628838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1628838 is an abundant number, since it is smaller than the sum of its proper divisors (2108610).

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

1628838 is a wasteful number, since it uses less digits than its factorization.

1628838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348 (or 5345 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1628838 is about 1276.2593780263. The cubic root of 1628838 is about 117.6592197919.

The spelling of 1628838 in words is "one million, six hundred twenty-eight thousand, eight hundred thirty-eight".