1620486 has 40 divisors (see below), whose sum is σ = 4152720. Its totient is φ = 462672.

The previous prime is 1620469. The next prime is 1620497. The reversal of 1620486 is 6840261.

It is a Harshad number since it is a multiple of its sum of digits (27).

1620486 is a modest number, since divided by 486 gives 162 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 420 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (103818).

2^1620486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076360).

1620486 is an abundant number, since it is smaller than the sum of its proper divisors (2532234).

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

1620486 is a wasteful number, since it uses less digits than its factorization.

1620486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1620486 is about 1272.9831106499. The cubic root of 1620486 is about 117.4577726637.

It can be divided in two parts, 16204 and 86, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 1620486 in words is "one million, six hundred twenty thousand, four hundred eighty-six".