1601988 has 12 divisors (see below), whose sum is σ = 3738000. Its totient is φ = 533992.

The previous prime is 1601969. The next prime is 1602011. The reversal of 1601988 is 8891061.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×1601988³ = 12333860454444186816, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66738 + ... + 66761.

It is an arithmetic number, because the mean of its divisors is an integer number (311500).

2^1601988 is an apocalyptic number.

It is an amenable number.

1601988 is an abundant number, since it is smaller than the sum of its proper divisors (2136012).

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

1601988 is a wasteful number, since it uses less digits than its factorization.

1601988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133506 (or 133504 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1601988 is about 1265.6966461202. The cubic root of 1601988 is about 117.0091307068.

The spelling of 1601988 in words is "one million, six hundred one thousand, nine hundred eighty-eight".