1620044332 has 6 divisors (see below), whose sum is σ = 2835077588. Its totient is φ = 810022164.

The previous prime is 1620044311. The next prime is 1620044339. The reversal of 1620044332 is 2334400261.

It is a junction number, because it is equal to n+sod(n) for n = 1620044297 and 1620044306.

It is not an unprimeable number, because it can be changed into a prime (1620044339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202505538 + ... + 202505545.

Almost surely, 2^1620044332 is an apocalyptic number.

It is an amenable number.

1620044332 is a deficient number, since it is larger than the sum of its proper divisors (1215033256).

1620044332 is a wasteful number, since it uses less digits than its factorization.

1620044332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405011087 (or 405011085 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1620044332 is about 40249.7743099263. The cubic root of 1620044332 is about 1174.4710054574.

Adding to 1620044332 its reverse (2334400261), we get a palindrome (3954444593).

The spelling of 1620044332 in words is "one billion, six hundred twenty million, forty-four thousand, three hundred thirty-two".