1040720686 has 4 divisors (see below), whose sum is σ = 1561081032. Its totient is φ = 520360342.

The previous prime is 1040720683. The next prime is 1040720693. The reversal of 1040720686 is 6860270401.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040720683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260180170 + ... + 260180173.

It is an arithmetic number, because the mean of its divisors is an integer number (390270258).

Almost surely, 2^1040720686 is an apocalyptic number.

1040720686 is a deficient number, since it is larger than the sum of its proper divisors (520360346).

1040720686 is an equidigital number, since it uses as much as digits as its factorization.

1040720686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520360345.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1040720686 is about 32260.2028201932. The cubic root of 1040720686 is about 1013.3933785643.

The spelling of 1040720686 in words is "one billion, forty million, seven hundred twenty thousand, six hundred eighty-six".