1620472636 has 24 divisors (see below), whose sum is σ = 2962630944. Its totient is φ = 774090240.

The previous prime is 1620472621. The next prime is 1620472649. The reversal of 1620472636 is 6362740261.

It is a junction number, because it is equal to n+sod(n) for n = 1620472595 and 1620472604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71056 + ... + 91048.

It is an arithmetic number, because the mean of its divisors is an integer number (123442956).

Almost surely, 2^1620472636 is an apocalyptic number.

It is an amenable number.

1620472636 is a deficient number, since it is larger than the sum of its proper divisors (1342158308).

1620472636 is a wasteful number, since it uses less digits than its factorization.

1620472636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20901 (or 20899 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1620472636 is about 40255.0945347294. The cubic root of 1620472636 is about 1174.5744977500.

The spelling of 1620472636 in words is "one billion, six hundred twenty million, four hundred seventy-two thousand, six hundred thirty-six".