82780546 has 8 divisors (see below), whose sum is σ = 124821504. Its totient is φ = 41173380.

The previous prime is 82780493. The next prime is 82780559. The reversal of 82780546 is 64508728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 82780499 and 82780508.

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, 107970 + ... + 108733.

It is an arithmetic number, because the mean of its divisors is an integer number (15602688).

Almost surely, 2^82780546 is an apocalyptic number.

82780546 is a deficient number, since it is larger than the sum of its proper divisors (42040958).

82780546 is a wasteful number, since it uses less digits than its factorization.

82780546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216896.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 82780546 is about 9098.3815044215. The cubic root of 82780546 is about 435.8222804854.

The spelling of 82780546 in words is "eighty-two million, seven hundred eighty thousand, five hundred forty-six".