1628420 has 12 divisors (see below), whose sum is σ = 3419724. Its totient is φ = 651360.

The previous prime is 1628401. The next prime is 1628441. The reversal of 1628420 is 248261.

It can be written as a sum of positive squares in 2 ways, for example, as 1236544 + 391876 = 1112^2 + 626^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40691 + ... + 40730.

It is an arithmetic number, because the mean of its divisors is an integer number (284977).

2^1628420 is an apocalyptic number.

1628420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628420 is an abundant number, since it is smaller than the sum of its proper divisors (1791304).

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

1628420 is a wasteful number, since it uses less digits than its factorization.

1628420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81430 (or 81428 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1628420 is about 1276.0956077034. The cubic root of 1628420 is about 117.6491541784.

It can be divided in two parts, 1628 and 420, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1628420 in words is "one million, six hundred twenty-eight thousand, four hundred twenty".