640010048 has 56 divisors (see below), whose sum is σ = 1335587880. Its totient is φ = 303851520.

The previous prime is 640010017. The next prime is 640010051. The reversal of 640010048 is 840010046.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40347904 + 599662144 = 6352^2 + 24488^2 .

It is a super-2 number, since 2×640010048² = 819225723081924608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110390 + ... + 116042.

Almost surely, 2^640010048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640010048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667793940).

640010048 is an abundant number, since it is smaller than the sum of its proper divisors (695577832).

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

640010048 is a wasteful number, since it uses less digits than its factorization.

640010048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755 (or 5745 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 640010048 is about 25298.4198716046. The cubic root of 640010048 is about 861.7783859391.

The spelling of 640010048 in words is "six hundred forty million, ten thousand, forty-eight".