853978780 has 12 divisors (see below), whose sum is σ = 1793355480. Its totient is φ = 341591504.

The previous prime is 853978777. The next prime is 853978831. The reversal of 853978780 is 87879358.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21349450 + ... + 21349489.

It is an arithmetic number, because the mean of its divisors is an integer number (149446290).

Almost surely, 2^853978780 is an apocalyptic number.

It is an amenable number.

853978780 is an abundant number, since it is smaller than the sum of its proper divisors (939376700).

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

853978780 is a wasteful number, since it uses less digits than its factorization.

853978780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42698948 (or 42698946 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The square root of 853978780 is about 29222.9153234238. The cubic root of 853978780 is about 948.7439651910.

The spelling of 853978780 in words is "eight hundred fifty-three million, nine hundred seventy-eight thousand, seven hundred eighty".