1620027164 has 24 divisors (see below), whose sum is σ = 3285692928. Its totient is φ = 684517680.

The previous prime is 1620027163. The next prime is 1620027221. The reversal of 1620027164 is 4617200261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620027163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405464 + ... + 409439.

It is an arithmetic number, because the mean of its divisors is an integer number (136903872).

Almost surely, 2^1620027164 is an apocalyptic number.

1620027164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1620027164 is an abundant number, since it is smaller than the sum of its proper divisors (1665665764).

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

1620027164 is a wasteful number, since it uses less digits than its factorization.

1620027164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814985 (or 814983 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1620027164 is about 40249.5610410847. The cubic root of 1620027164 is about 1174.4668567254.

The spelling of 1620027164 in words is "one billion, six hundred twenty million, twenty-seven thousand, one hundred sixty-four".