1601570820 has 48 divisors (see below), whose sum is σ = 4639037760. Its totient is φ = 412358016.

The previous prime is 1601570807. The next prime is 1601570827. The reversal of 1601570820 is 280751061.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1601570827) 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 15 ways as a sum of consecutive naturals, for example, 458482 + ... + 461961.

It is an arithmetic number, because the mean of its divisors is an integer number (96646620).

Almost surely, 2^1601570820 is an apocalyptic number.

1601570820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601570820 is an abundant number, since it is smaller than the sum of its proper divisors (3037466940).

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

1601570820 is a wasteful number, since it uses less digits than its factorization.

1601570820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920484 (or 920482 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1601570820 is about 40019.6304330762. The cubic root of 1601570820 is about 1169.9897288893.

The spelling of 1601570820 in words is "one billion, six hundred one million, five hundred seventy thousand, eight hundred twenty".