1620494528 has 14 divisors (see below), whose sum is σ = 3215668956. Its totient is φ = 810247232.

The previous prime is 1620494501. The next prime is 1620494539. The reversal of 1620494528 is 8254940261.

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 as a sum of consecutive naturals, namely, 12660050 + ... + 12660177.

Almost surely, 2^1620494528 is an apocalyptic number.

It is an amenable number.

1620494528 is a deficient number, since it is larger than the sum of its proper divisors (1595174428).

1620494528 is an equidigital number, since it uses as much as digits as its factorization.

1620494528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25320239 (or 25320229 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 1620494528 is about 40255.3664497046. The cubic root of 1620494528 is about 1174.5797870852.

The spelling of 1620494528 in words is "one billion, six hundred twenty million, four hundred ninety-four thousand, five hundred twenty-eight".