819707274 has 12 divisors (see below), whose sum is σ = 1776032466. Its totient is φ = 273235752.

The previous prime is 819707261. The next prime is 819707293. The reversal of 819707274 is 472707918.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 513702225 + 306005049 = 22665^2 + 17493^2 .

It is a super-3 number, since 3×819707274³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 22769629 + ... + 22769664.

Almost surely, 2^819707274 is an apocalyptic number.

819707274 is an abundant number, since it is smaller than the sum of its proper divisors (956325192).

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

819707274 is a wasteful number, since it uses less digits than its factorization.

819707274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45539301 (or 45539298 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 819707274 is about 28630.5304526479. The cubic root of 819707274 is about 935.8787715557.

The spelling of 819707274 in words is "eight hundred nineteen million, seven hundred seven thousand, two hundred seventy-four".