1620675620 has 48 divisors (see below), whose sum is σ = 3680328960. Its totient is φ = 597149184.

The previous prime is 1620675577. The next prime is 1620675647. The reversal of 1620675620 is 265760261.

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 15 ways as a sum of consecutive naturals, for example, 34730 + ... + 66689.

It is an arithmetic number, because the mean of its divisors is an integer number (76673520).

Almost surely, 2^1620675620 is an apocalyptic number.

1620675620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620675620 is an abundant number, since it is smaller than the sum of its proper divisors (2059653340).

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

1620675620 is a wasteful number, since it uses less digits than its factorization.

1620675620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101492 (or 101490 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1620675620 is about 40257.6156770368. The cubic root of 1620675620 is about 1174.6235389721.

The spelling of 1620675620 in words is "one billion, six hundred twenty million, six hundred seventy-five thousand, six hundred twenty".