1628380 has 24 divisors (see below), whose sum is σ = 3683232. Its totient is φ = 601152.

The previous prime is 1628369. The next prime is 1628381. The reversal of 1628380 is 838261.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628381) 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 7 ways as a sum of consecutive naturals, for example, 2872 + ... + 3391.

It is an arithmetic number, because the mean of its divisors is an integer number (153468).

2^1628380 is an apocalyptic number.

1628380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628380 is an abundant number, since it is smaller than the sum of its proper divisors (2054852).

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

1628380 is a wasteful number, since it uses less digits than its factorization.

1628380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6283 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1628380 is about 1276.0799348003. The cubic root of 1628380 is about 117.6481908715.

The spelling of 1628380 in words is "one million, six hundred twenty-eight thousand, three hundred eighty".