1020640010 has 48 divisors (see below), whose sum is σ = 2016837144. Its totient is φ = 371644416.

The previous prime is 1020639989. The next prime is 1020640013. The reversal of 1020640010 is 100460201.

It can be written as a sum of positive squares in 12 ways, for example, as 10608049 + 1010031961 = 3257^2 + 31781^2 .

It is not an unprimeable number, because it can be changed into a prime (1020640013) 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 23 ways as a sum of consecutive naturals, for example, 119234 + ... + 127506.

Almost surely, 2^1020640010 is an apocalyptic number.

1020640010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020640010 is a deficient number, since it is larger than the sum of its proper divisors (996197134).

1020640010 is a wasteful number, since it uses less digits than its factorization.

1020640010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379 (or 8366 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1020640010 is about 31947.4570192997. The cubic root of 1020640010 is about 1006.8332042988.

The spelling of 1020640010 in words is "one billion, twenty million, six hundred forty thousand, ten".