1000640326 has 8 divisors (see below), whose sum is σ = 1715383440. Its totient is φ = 428845848.

The previous prime is 1000640309. The next prime is 1000640393. The reversal of 1000640326 is 6230460001.

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

It is a junction number, because it is equal to n+sod(n) for n = 1000640297 and 1000640306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35737141 + ... + 35737168.

It is an arithmetic number, because the mean of its divisors is an integer number (214422930).

Almost surely, 2^1000640326 is an apocalyptic number.

1000640326 is a deficient number, since it is larger than the sum of its proper divisors (714743114).

1000640326 is an equidigital number, since it uses as much as digits as its factorization.

1000640326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71474318.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1000640326 is about 31632.8994244916. The cubic root of 1000640326 is about 1000.2133964587.

The spelling of 1000640326 in words is "one billion, six hundred forty thousand, three hundred twenty-six".