640048260 has 48 divisors (see below), whose sum is σ = 1793937600. Its totient is φ = 170507904.

The previous prime is 640048259. The next prime is 640048271. The reversal of 640048260 is 62840046.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61731 + ... + 71349.

It is an arithmetic number, because the mean of its divisors is an integer number (37373700).

Almost surely, 2^640048260 is an apocalyptic number.

640048260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640048260 is an abundant number, since it is smaller than the sum of its proper divisors (1153889340).

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

640048260 is a wasteful number, since it uses less digits than its factorization.

640048260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10740 (or 10738 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 640048260 is about 25299.1750853659. The cubic root of 640048260 is about 861.7955365138.

The spelling of 640048260 in words is "six hundred forty million, forty-eight thousand, two hundred sixty".