1320641894 has 32 divisors (see below), whose sum is σ = 2356784640. Its totient is φ = 547092000.

The previous prime is 1320641893. The next prime is 1320641921. The reversal of 1320641894 is 4981460231.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320641893) 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, 6632 + ... + 51819.

It is an arithmetic number, because the mean of its divisors is an integer number (73649520).

Almost surely, 2^1320641894 is an apocalyptic number.

1320641894 is a deficient number, since it is larger than the sum of its proper divisors (1036142746).

1320641894 is a wasteful number, since it uses less digits than its factorization.

1320641894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58556.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1320641894 is about 36340.6369509396. The cubic root of 1320641894 is about 1097.1390930063.

The spelling of 1320641894 in words is "one billion, three hundred twenty million, six hundred forty-one thousand, eight hundred ninety-four".