1664014240 has 96 divisors (see below), whose sum is σ = 4500437760. Its totient is φ = 569554944.

The previous prime is 1664014223. The next prime is 1664014241. The reversal of 1664014240 is 424104661.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1664014199 and 1664014208.

It is not an unprimeable number, because it can be changed into a prime (1664014241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066581 + ... + 1068139.

It is an arithmetic number, because the mean of its divisors is an integer number (46879560).

Almost surely, 2^1664014240 is an apocalyptic number.

1664014240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664014240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2250218880).

1664014240 is an abundant number, since it is smaller than the sum of its proper divisors (2836423520).

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

1664014240 is a wasteful number, since it uses less digits than its factorization.

1664014240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534 (or 2526 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1664014240 is about 40792.3306517291. The cubic root of 1664014240 is about 1185.0018076373.

The spelling of 1664014240 in words is "one billion, six hundred sixty-four million, fourteen thousand, two hundred forty".