82774405 has 16 divisors (see below), whose sum is σ = 114626304. Its totient is φ = 56206080.

The previous prime is 82774403. The next prime is 82774423. The reversal of 82774405 is 50447728.

It is not a de Polignac number, because 82774405 - 2¹ = 82774403 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 (82774403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7876 + ... + 15085.

It is an arithmetic number, because the mean of its divisors is an integer number (7164144).

Almost surely, 2^82774405 is an apocalyptic number.

It is an amenable number.

82774405 is a deficient number, since it is larger than the sum of its proper divisors (31851899).

82774405 is a wasteful number, since it uses less digits than its factorization.

82774405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23076.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 82774405 is about 9098.0440205574. The cubic root of 82774405 is about 435.8115031915.

The spelling of 82774405 in words is "eighty-two million, seven hundred seventy-four thousand, four hundred five".