854781864 has 32 divisors (see below), whose sum is σ = 2186653920. Its totient is φ = 278300736.

The previous prime is 854781847. The next prime is 854781869. The reversal of 854781864 is 468187458.

It is not an unprimeable number, because it can be changed into a prime (854781869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413107 + ... + 415170.

It is an arithmetic number, because the mean of its divisors is an integer number (68332935).

Almost surely, 2^854781864 is an apocalyptic number.

It is an amenable number.

854781864 is an abundant number, since it is smaller than the sum of its proper divisors (1331872056).

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

854781864 is a wasteful number, since it uses less digits than its factorization.

854781864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828329 (or 828325 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 51.

The square root of 854781864 is about 29236.6527495881. The cubic root of 854781864 is about 949.0412724948.

The spelling of 854781864 in words is "eight hundred fifty-four million, seven hundred eighty-one thousand, eight hundred sixty-four".