1620743632 has 30 divisors (see below), whose sum is σ = 3168625382. Its totient is φ = 803099136.

The previous prime is 1620743627. The next prime is 1620743639. The reversal of 1620743632 is 2363470261.

It can be written as a sum of positive squares in 3 ways, for example, as 212693056 + 1408050576 = 14584^2 + 37524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620743639) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 200338 + ... + 208270.

Almost surely, 2^1620743632 is an apocalyptic number.

It is an amenable number.

1620743632 is a deficient number, since it is larger than the sum of its proper divisors (1547881750).

1620743632 is an equidigital number, since it uses as much as digits as its factorization.

1620743632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167 (or 8048 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 1620743632 is about 40258.4603779131. The cubic root of 1620743632 is about 1174.6399698519.

The spelling of 1620743632 in words is "one billion, six hundred twenty million, seven hundred forty-three thousand, six hundred thirty-two".