8440680477 has 16 divisors (see below), whose sum is σ = 11353794560. Its totient is φ = 5577429312.

The previous prime is 8440680467. The next prime is 8440680481. The reversal of 8440680477 is 7740860448.

It is a happy number.

It is not a de Polignac number, because 8440680477 - 2⁸ = 8440680221 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 (8440680467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406299 + ... + 426567.

It is an arithmetic number, because the mean of its divisors is an integer number (709612160).

Almost surely, 2^8440680477 is an apocalyptic number.

It is an amenable number.

8440680477 is a deficient number, since it is larger than the sum of its proper divisors (2913114083).

8440680477 is a wasteful number, since it uses less digits than its factorization.

8440680477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21492.

The product of its (nonzero) digits is 1204224, while the sum is 48.

The square root of 8440680477 is about 91873.1760472011. The cubic root of 8440680477 is about 2036.0689771361.

The spelling of 8440680477 in words is "eight billion, four hundred forty million, six hundred eighty thousand, four hundred seventy-seven".