1620294479 has 16 divisors (see below), whose sum is σ = 1667221056. Its totient is φ = 1574227200.

The previous prime is 1620294461. The next prime is 1620294493. The reversal of 1620294479 is 9744920261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620294479 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 (1620294979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1526609 + ... + 1527669.

It is an arithmetic number, because the mean of its divisors is an integer number (104201316).

Almost surely, 2^1620294479 is an apocalyptic number.

1620294479 is a deficient number, since it is larger than the sum of its proper divisors (46926577).

1620294479 is a wasteful number, since it uses less digits than its factorization.

1620294479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1620294479 is about 40252.8816235558. The cubic root of 1620294479 is about 1174.5314513915.

The spelling of 1620294479 in words is "one billion, six hundred twenty million, two hundred ninety-four thousand, four hundred seventy-nine".