82777485 has 16 divisors (see below), whose sum is σ = 151364736. Its totient is φ = 37841088.

The previous prime is 82777469. The next prime is 82777489. The reversal of 82777485 is 58477728.

It is a happy number.

It is not a de Polignac number, because 82777485 - 2⁴ = 82777469 is a prime.

It is a super-2 number, since 2×82777485² = 13704224045850450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82777489) 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, 394074 + ... + 394283.

It is an arithmetic number, because the mean of its divisors is an integer number (9460296).

Almost surely, 2^82777485 is an apocalyptic number.

It is an amenable number.

82777485 is a deficient number, since it is larger than the sum of its proper divisors (68587251).

82777485 is a wasteful number, since it uses less digits than its factorization.

82777485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788372.

The product of its digits is 878080, while the sum is 48.

The square root of 82777485 is about 9098.2132861348. The cubic root of 82777485 is about 435.8169085773.

The spelling of 82777485 in words is "eighty-two million, seven hundred seventy-seven thousand, four hundred eighty-five".