1620336407 has 8 divisors (see below), whose sum is σ = 1693760640. Its totient is φ = 1547160120.

The previous prime is 1620336379. The next prime is 1620336413. The reversal of 1620336407 is 7046330261.

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

It is a cyclic number.

It is not a de Polignac number, because 1620336407 - 2¹⁰ = 1620335383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620336437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48557 + ... + 74822.

It is an arithmetic number, because the mean of its divisors is an integer number (211720080).

Almost surely, 2^1620336407 is an apocalyptic number.

1620336407 is a deficient number, since it is larger than the sum of its proper divisors (73424233).

1620336407 is a wasteful number, since it uses less digits than its factorization.

1620336407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123973.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 1620336407 is about 40253.4024276209. The cubic root of 1620336407 is about 1174.5415823339.

Adding to 1620336407 its reverse (7046330261), we get a palindrome (8666666668).

The spelling of 1620336407 in words is "one billion, six hundred twenty million, three hundred thirty-six thousand, four hundred seven".