1620104434 has 8 divisors (see below), whose sum is σ = 2617091820. Its totient is φ = 747740496.

The previous prime is 1620104413. The next prime is 1620104449. The reversal of 1620104434 is 4344010261.

It can be written as a sum of positive squares in 2 ways, for example, as 1615798809 + 4305625 = 40197^2 + 2075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1620104399 and 1620104408.

It is an unprimeable number.

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, 31155829 + ... + 31155880.

Almost surely, 2^1620104434 is an apocalyptic number.

1620104434 is a deficient number, since it is larger than the sum of its proper divisors (996987386).

1620104434 is a wasteful number, since it uses less digits than its factorization.

1620104434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62311724.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1620104434 is about 40250.5209158838. The cubic root of 1620104434 is about 1174.4855291718.

Adding to 1620104434 its reverse (4344010261), we get a palindrome (5964114695).

The spelling of 1620104434 in words is "one billion, six hundred twenty million, one hundred four thousand, four hundred thirty-four".