1894778880 has 192 divisors, whose sum is σ = 6229379520. Its totient is φ = 491323392.

The previous prime is 1894778861. The next prime is 1894778881. The reversal of 1894778880 is 888774981.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Smith number, since the sum of its digits (60) 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 (60).

It is not an unprimeable number, because it can be changed into a prime (1894778881) 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, 1135807 + ... + 1137473.

It is an arithmetic number, because the mean of its divisors is an integer number (32444685).

Almost surely, 2^1894778880 is an apocalyptic number.

1894778880 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 1894778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3114689760).

1894778880 is an abundant number, since it is smaller than the sum of its proper divisors (4334600640).

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

1894778880 is a wasteful number, since it uses less digits than its factorization.

1894778880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1714 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 60.

The square root of 1894778880 is about 43529.0578809144. The cubic root of 1894778880 is about 1237.4267831389.

The spelling of 1894778880 in words is "one billion, eight hundred ninety-four million, seven hundred seventy-eight thousand, eight hundred eighty".