82351978 has 16 divisors (see below), whose sum is σ = 132750144. Its totient is φ = 38174400.

The previous prime is 82351963. The next prime is 82351981. The reversal of 82351978 is 87915328.

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, 15798 + ... + 20353.

It is an arithmetic number, because the mean of its divisors is an integer number (8296884).

Almost surely, 2^82351978 is an apocalyptic number.

82351978 is a deficient number, since it is larger than the sum of its proper divisors (50398166).

82351978 is a wasteful number, since it uses less digits than its factorization.

82351978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36237.

The product of its digits is 120960, while the sum is 43.

The square root of 82351978 is about 9074.7990611363. The cubic root of 82351978 is about 435.0688718186.

The spelling of 82351978 in words is "eighty-two million, three hundred fifty-one thousand, nine hundred seventy-eight".