642748960 has 48 divisors (see below), whose sum is σ = 1735425216. Its totient is φ = 220370688.

The previous prime is 642748957. The next prime is 642748963. The reversal of 642748960 is 69847246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (642748957) and next prime (642748963).

It is a self number, because there is not a number n which added to its sum of digits gives 642748960.

It is not an unprimeable number, because it can be changed into a prime (642748963) 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, 285822 + ... + 288061.

It is an arithmetic number, because the mean of its divisors is an integer number (36154692).

Almost surely, 2^642748960 is an apocalyptic number.

It is an amenable number.

642748960 is an abundant number, since it is smaller than the sum of its proper divisors (1092676256).

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

642748960 is a wasteful number, since it uses less digits than its factorization.

642748960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573905 (or 573897 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 642748960 is about 25352.4941573803. The cubic root of 642748960 is about 863.0059584059.

The spelling of 642748960 in words is "six hundred forty-two million, seven hundred forty-eight thousand, nine hundred sixty".