1620398592 has 90 divisors (see below), whose sum is σ = 4684479657. Its totient is φ = 539222016.

The previous prime is 1620398587. The next prime is 1620398617. The reversal of 1620398592 is 2958930261.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1620398592 is a `hidden beast` number, since 1 + 6 + 20 + 39 + 8 + 592 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1598720256 + 21678336 = 39984^2 + 4656^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=28464.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2732248 + ... + 2732840.

Almost surely, 2^1620398592 is an apocalyptic number.

1620398592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620398592

1620398592 is an abundant number, since it is smaller than the sum of its proper divisors (3064081065).

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

1620398592 is an frugal number, since it uses more digits than its factorization.

1620398592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1620398592 is about 40254.1748393878. The cubic root of 1620398592 is about 1174.5566075952.

The spelling of 1620398592 in words is "one billion, six hundred twenty million, three hundred ninety-eight thousand, five hundred ninety-two".