1601988446 has 4 divisors (see below), whose sum is σ = 2402982672. Its totient is φ = 800994222.

The previous prime is 1601988419. The next prime is 1601988461. The reversal of 1601988446 is 6448891061.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×1601988446³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1601988446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400497110 + ... + 400497113.

It is an arithmetic number, because the mean of its divisors is an integer number (600745668).

Almost surely, 2^1601988446 is an apocalyptic number.

1601988446 is a deficient number, since it is larger than the sum of its proper divisors (800994226).

1601988446 is an equidigital number, since it uses as much as digits as its factorization.

1601988446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800994225.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 1601988446 is about 40024.8478572998. The cubic root of 1601988446 is about 1170.0914156541.

The spelling of 1601988446 in words is "one billion, six hundred one million, nine hundred eighty-eight thousand, four hundred forty-six".