1620028704870 has 48 divisors (see below), whose sum is σ = 4212585703872. Its totient is φ = 431955237120.

The previous prime is 1620028704851. The next prime is 1620028704919. The reversal of 1620028704870 is 784078200261.

1620028704870 is a `hidden beast` number, since 162 + 0 + 0 + 2 + 8 + 7 + 0 + 487 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343326 + ... + 1832465.

It is an arithmetic number, because the mean of its divisors is an integer number (87762202164).

Almost surely, 2^{1620028704870} is an apocalyptic number.

1620028704870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620028704870 is an abundant number, since it is smaller than the sum of its proper divisors (2592556999002).

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

1620028704870 is a wasteful number, since it uses less digits than its factorization.

1620028704870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184077 (or 2184074 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 1620028704870 in words is "one trillion, six hundred twenty billion, twenty-eight million, seven hundred four thousand, eight hundred seventy".