1620828 has 36 divisors (see below), whose sum is σ = 4470648. Its totient is φ = 491040.

The previous prime is 1620823. The next prime is 1620841. The reversal of 1620828 is 8280261.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1651 + ... + 2442.

2^1620828 is an apocalyptic number.

1620828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1620828 is an abundant number, since it is smaller than the sum of its proper divisors (2849820).

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

1620828 is a wasteful number, since it uses less digits than its factorization.

1620828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114 (or 4109 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1620828 is about 1273.1174337036. The cubic root of 1620828 is about 117.4660351505.

The spelling of 1620828 in words is "one million, six hundred twenty thousand, eight hundred twenty-eight".