1994488320 has 160 divisors (see below), whose sum is σ = 6956072640. Its totient is φ = 483491840.

The previous prime is 1994488313. The next prime is 1994488373. The reversal of 1994488320 is 238844991.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1994488320.

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, 72676 + ... + 96284.

It is an arithmetic number, because the mean of its divisors is an integer number (43475454).

Almost surely, 2^1994488320 is an apocalyptic number.

1994488320 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 1994488320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3478036320).

1994488320 is an abundant number, since it is smaller than the sum of its proper divisors (4961584320).

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

1994488320 is a wasteful number, since it uses less digits than its factorization.

1994488320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646 (or 23630 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 1994488320 is about 44659.6945802364. The cubic root of 1994488320 is about 1258.7626048038.

The spelling of 1994488320 in words is "one billion, nine hundred ninety-four million, four hundred eighty-eight thousand, three hundred twenty".