819682988 has 24 divisors (see below), whose sum is σ = 1494354960. Its totient is φ = 393063680.

The previous prime is 819682987. The next prime is 819683003. The reversal of 819682988 is 889286918.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is not an unprimeable number, because it can be changed into a prime (819682987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32681 + ... + 52032.

It is an arithmetic number, because the mean of its divisors is an integer number (62264790).

Almost surely, 2^819682988 is an apocalyptic number.

It is an amenable number.

819682988 is a deficient number, since it is larger than the sum of its proper divisors (674671972).

819682988 is a wasteful number, since it uses less digits than its factorization.

819682988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84817 (or 84815 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 59.

The square root of 819682988 is about 28630.1063218424. The cubic root of 819682988 is about 935.8695288349.

The spelling of 819682988 in words is "eight hundred nineteen million, six hundred eighty-two thousand, nine hundred eighty-eight".