1620670 has 16 divisors (see below), whose sum is σ = 2985840. Its totient is φ = 633024.

The previous prime is 1620667. The next prime is 1620677. The reversal of 1620670 is 760261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455 + ... + 2314.

It is an arithmetic number, because the mean of its divisors is an integer number (186615).

2^1620670 is an apocalyptic number.

1620670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620670 is a deficient number, since it is larger than the sum of its proper divisors (1365170).

1620670 is a wasteful number, since it uses less digits than its factorization.

1620670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1620670 is about 1273.0553797852. The cubic root of 1620670 is about 117.4622181227.

The spelling of 1620670 in words is "one million, six hundred twenty thousand, six hundred seventy".