1000640080 has 40 divisors (see below), whose sum is σ = 2537989344. Its totient is φ = 363868800.

The previous prime is 1000640033. The next prime is 1000640087. The reversal of 1000640080 is 800460001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000640087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567666 + ... + 569425.

Almost surely, 2^1000640080 is an apocalyptic number.

1000640080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000640080 is an abundant number, since it is smaller than the sum of its proper divisors (1537349264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000640080 is a wasteful number, since it uses less digits than its factorization.

1000640080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137115 (or 1137109 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1000640080 is about 31632.8955361345. The cubic root of 1000640080 is about 1000.2133144937.

It can be divided in two parts, 10006 and 40080, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 1000640080 in words is "one billion, six hundred forty thousand, eighty".