82798578 has 16 divisors (see below), whose sum is σ = 183996960. Its totient is φ = 27599508.

The previous prime is 82798549. The next prime is 82798591. The reversal of 82798578 is 87589728.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1533307 = 82798578 / (8 + 2 + 7 + 9 + 8 + 5 + 7 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766600 + ... + 766707.

It is an arithmetic number, because the mean of its divisors is an integer number (11499810).

Almost surely, 2^82798578 is an apocalyptic number.

82798578 is an abundant number, since it is smaller than the sum of its proper divisors (101198382).

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

82798578 is a wasteful number, since it uses less digits than its factorization.

82798578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533318 (or 1533312 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 82798578 is about 9099.3723959403. The cubic root of 82798578 is about 435.8539230922.

The spelling of 82798578 in words is "eighty-two million, seven hundred ninety-eight thousand, five hundred seventy-eight".