1620513460 has 12 divisors (see below), whose sum is σ = 3403078308. Its totient is φ = 648205376.

The previous prime is 1620513431. The next prime is 1620513467. The reversal of 1620513460 is 643150261.

It can be written as a sum of positive squares in 2 ways, for example, as 395373456 + 1225140004 = 19884^2 + 35002^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620513467) 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 3 ways as a sum of consecutive naturals, for example, 40512817 + ... + 40512856.

It is an arithmetic number, because the mean of its divisors is an integer number (283589859).

Almost surely, 2^1620513460 is an apocalyptic number.

1620513460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620513460 is an abundant number, since it is smaller than the sum of its proper divisors (1782564848).

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

1620513460 is a wasteful number, since it uses less digits than its factorization.

1620513460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81025682 (or 81025680 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1620513460 is about 40255.6015977901. The cubic root of 1620513460 is about 1174.5843612152.

The spelling of 1620513460 in words is "one billion, six hundred twenty million, five hundred thirteen thousand, four hundred sixty".