8427497782 has 12 divisors (see below), whose sum is σ = 13894924428. Its totient is φ = 3830680700.

The previous prime is 8427497753. The next prime is 8427497789. The reversal of 8427497782 is 2877947248.

It is a super-2 number, since 2×8427497782² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8427497789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17411944 + ... + 17412427.

It is an arithmetic number, because the mean of its divisors is an integer number (1157910369).

Almost surely, 2^8427497782 is an apocalyptic number.

8427497782 is a deficient number, since it is larger than the sum of its proper divisors (5467426646).

8427497782 is a wasteful number, since it uses less digits than its factorization.

8427497782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34824395 (or 34824384 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 58.

The square root of 8427497782 is about 91801.4040306574. The cubic root of 8427497782 is about 2035.0084440848.

The spelling of 8427497782 in words is "eight billion, four hundred twenty-seven million, four hundred ninety-seven thousand, seven hundred eighty-two".