640301442 has 32 divisors (see below), whose sum is σ = 1398829824. Its totient is φ = 193779600.

The previous prime is 640301429. The next prime is 640301449. The reversal of 640301442 is 244103046.

It is not an unprimeable number, because it can be changed into a prime (640301449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48717 + ... + 60447.

It is an arithmetic number, because the mean of its divisors is an integer number (43713432).

Almost surely, 2^640301442 is an apocalyptic number.

640301442 is an abundant number, since it is smaller than the sum of its proper divisors (758528382).

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

640301442 is a wasteful number, since it uses less digits than its factorization.

640301442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12574.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 640301442 is about 25304.1783506203. The cubic root of 640301442 is about 861.9091541724.

Adding to 640301442 its reverse (244103046), we get a palindrome (884404488).

The spelling of 640301442 in words is "six hundred forty million, three hundred one thousand, four hundred forty-two".