1664231424 has 96 divisors (see below), whose sum is σ = 4630167360. Its totient is φ = 530579456.

The previous prime is 1664231417. The next prime is 1664231441. The reversal of 1664231424 is 4241324661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135424 + ... + 147200.

It is an arithmetic number, because the mean of its divisors is an integer number (48230910).

Almost surely, 2^1664231424 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 1664231424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2315083680).

1664231424 is an abundant number, since it is smaller than the sum of its proper divisors (2965935936).

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

1664231424 is a wasteful number, since it uses less digits than its factorization.

1664231424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11825 (or 11805 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 1664231424 is about 40794.9926339005. The cubic root of 1664231424 is about 1185.0533601281.

The spelling of 1664231424 in words is "one billion, six hundred sixty-four million, two hundred thirty-one thousand, four hundred twenty-four".