1894494720 has 320 divisors, whose sum is σ = 6381555840. Its totient is φ = 478937088.

The previous prime is 1894494703. The next prime is 1894494727. The reversal of 1894494720 is 274944981.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×1894494720² = 7178220488215756800, which contains 22 as substring.

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 1894494720.

It is not an unprimeable number, because it can be changed into a prime (1894494727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16765384 + ... + 16765496.

It is an arithmetic number, because the mean of its divisors is an integer number (19942362).

Almost surely, 2^1894494720 is an apocalyptic number.

1894494720 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 1894494720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3190777920).

1894494720 is an abundant number, since it is smaller than the sum of its proper divisors (4487061120).

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

1894494720 is a wasteful number, since it uses less digits than its factorization.

1894494720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1894494720 is about 43525.7937319930. The cubic root of 1894494720 is about 1237.3649210789.

The spelling of 1894494720 in words is "one billion, eight hundred ninety-four million, four hundred ninety-four thousand, seven hundred twenty".