1620366 has 16 divisors (see below), whose sum is σ = 3535488. Its totient is φ = 491000.

The previous prime is 1620347. The next prime is 1620371. The reversal of 1620366 is 6630261.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 12210 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (220968).

2^1620366 is an apocalyptic number.

1620366 is an abundant number, since it is smaller than the sum of its proper divisors (1915122).

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

1620366 is a wasteful number, since it uses less digits than its factorization.

1620366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24567.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1620366 is about 1272.9359763947. The cubic root of 1620366 is about 117.4548732700.

The spelling of 1620366 in words is "one million, six hundred twenty thousand, three hundred sixty-six".