82778695 has 16 divisors (see below), whose sum is σ = 105457248. Its totient is φ = 62161920.

The previous prime is 82778693. The next prime is 82778699. The reversal of 82778695 is 59687728.

It is not a de Polignac number, because 82778695 - 2¹ = 82778693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82778693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37780 + ... + 39910.

It is an arithmetic number, because the mean of its divisors is an integer number (6591078).

Almost surely, 2^82778695 is an apocalyptic number.

82778695 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

82778695 is a deficient number, since it is larger than the sum of its proper divisors (22678553).

82778695 is a wasteful number, since it uses less digits than its factorization.

82778695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610.

The product of its digits is 1693440, while the sum is 52.

The square root of 82778695 is about 9098.2797824644. The cubic root of 82778695 is about 435.8190320851.

The spelling of 82778695 in words is "eighty-two million, seven hundred seventy-eight thousand, six hundred ninety-five".