82428287 has 4 divisors (see below), whose sum is σ = 85087296. Its totient is φ = 79769280.

The previous prime is 82428277. The next prime is 82428337. The reversal of 82428287 is 78282428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82428287 - 2²⁴ = 65651071 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 (82428277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1329458 + ... + 1329519.

It is an arithmetic number, because the mean of its divisors is an integer number (21271824).

Almost surely, 2^82428287 is an apocalyptic number.

82428287 is a deficient number, since it is larger than the sum of its proper divisors (2659009).

82428287 is a wasteful number, since it uses less digits than its factorization.

82428287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659008.

The product of its digits is 114688, while the sum is 41.

The square root of 82428287 is about 9079.0025333183. The cubic root of 82428287 is about 435.2032115237.

The spelling of 82428287 in words is "eighty-two million, four hundred twenty-eight thousand, two hundred eighty-seven".