1601620788 has 48 divisors (see below), whose sum is σ = 3799627776. Its totient is φ = 525003360.

The previous prime is 1601620781. The next prime is 1601620807. The reversal of 1601620788 is 8870261061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601620781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218503 + ... + 225713.

It is an arithmetic number, because the mean of its divisors is an integer number (79158912).

Almost surely, 2^1601620788 is an apocalyptic number.

It is an amenable number.

1601620788 is an abundant number, since it is smaller than the sum of its proper divisors (2198006988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601620788 is a wasteful number, since it uses less digits than its factorization.

1601620788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524 (or 7522 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 1601620788 is about 40020.2547218280. The cubic root of 1601620788 is about 1170.0018964101.

The spelling of 1601620788 in words is "one billion, six hundred one million, six hundred twenty thousand, seven hundred eighty-eight".