1894782020 has 24 divisors (see below), whose sum is σ = 3988249944. Its totient is φ = 756158976.

The previous prime is 1894782007. The next prime is 1894782023. The reversal of 1894782020 is 202874981.

It can be written as a sum of positive squares in 4 ways, for example, as 64995844 + 1829786176 = 8062^2 + 42776^2 .

It is not an unprimeable number, because it can be changed into a prime (1894782023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100739 + ... + 118058.

It is an arithmetic number, because the mean of its divisors is an integer number (166177081).

Almost surely, 2^1894782020 is an apocalyptic number.

1894782020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1894782020 is an abundant number, since it is smaller than the sum of its proper divisors (2093467924).

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

1894782020 is a wasteful number, since it uses less digits than its factorization.

1894782020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219239 (or 219237 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 1894782020 is about 43529.0939487603. The cubic root of 1894782020 is about 1237.4274666870.

The spelling of 1894782020 in words is "one billion, eight hundred ninety-four million, seven hundred eighty-two thousand, twenty".