819960894 has 40 divisors (see below), whose sum is σ = 1880064120. Its totient is φ = 266961744.

The previous prime is 819960887. The next prime is 819960913. The reversal of 819960894 is 498069918.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 819960894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51889 + ... + 65820.

It is an arithmetic number, because the mean of its divisors is an integer number (47001603).

Almost surely, 2^819960894 is an apocalyptic number.

819960894 is an abundant number, since it is smaller than the sum of its proper divisors (1060103226).

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

819960894 is a wasteful number, since it uses less digits than its factorization.

819960894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117766 (or 117757 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 819960894 is about 28634.9592980329. The cubic root of 819960894 is about 935.9752828779.

The spelling of 819960894 in words is "eight hundred nineteen million, nine hundred sixty thousand, eight hundred ninety-four".