827640782 has 8 divisors (see below), whose sum is σ = 1242727056. Its totient is φ = 413398432.

The previous prime is 827640769. The next prime is 827640787. The reversal of 827640782 is 287046728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×827640782⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827640787) 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, 208523 + ... + 212454.

It is an arithmetic number, because the mean of its divisors is an integer number (155340882).

Almost surely, 2^827640782 is an apocalyptic number.

827640782 is a deficient number, since it is larger than the sum of its proper divisors (415086274).

827640782 is a wasteful number, since it uses less digits than its factorization.

827640782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421962.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 827640782 is about 28768.7466185095. The cubic root of 827640782 is about 938.8883728148. Note that the first 3 decimals are identical.

The spelling of 827640782 in words is "eight hundred twenty-seven million, six hundred forty thousand, seven hundred eighty-two".