1979952856 has 16 divisors (see below), whose sum is σ = 4242756240. Its totient is φ = 848551200.

The previous prime is 1979952841. The next prime is 1979952869. The reversal of 1979952856 is 6582599791.

It is a junction number, because it is equal to n+sod(n) for n = 1979952794 and 1979952803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17678095 + ... + 17678206.

It is an arithmetic number, because the mean of its divisors is an integer number (265172265).

Almost surely, 2^1979952856 is an apocalyptic number.

It is an amenable number.

1979952856 is an abundant number, since it is smaller than the sum of its proper divisors (2262803384).

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

1979952856 is a wasteful number, since it uses less digits than its factorization.

1979952856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35356314 (or 35356310 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 61.

The square root of 1979952856 is about 44496.6611781154. The cubic root of 1979952856 is about 1255.6972693928.

The spelling of 1979952856 in words is "one billion, nine hundred seventy-nine million, nine hundred fifty-two thousand, eight hundred fifty-six".