1601427328 has 128 divisors (see below), whose sum is σ = 3446784000. Its totient is φ = 739694592.

The previous prime is 1601427313. The next prime is 1601427337. The reversal of 1601427328 is 8237241061.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1601427293 and 1601427302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12609601 + ... + 12609727.

It is an arithmetic number, because the mean of its divisors is an integer number (26928000).

Almost surely, 2^1601427328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601427328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723392000).

1601427328 is an abundant number, since it is smaller than the sum of its proper divisors (1845356672).

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

1601427328 is a wasteful number, since it uses less digits than its factorization.

1601427328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1601427328 is about 40017.8376227402. The cubic root of 1601427328 is about 1169.9547862821.

Adding to 1601427328 its reverse (8237241061), we get a palindrome (9838668389).

The spelling of 1601427328 in words is "one billion, six hundred one million, four hundred twenty-seven thousand, three hundred twenty-eight".