642303942 has 128 divisors (see below), whose sum is σ = 1587609600. Its totient is φ = 169361280.

The previous prime is 642303917. The next prime is 642303947. The reversal of 642303942 is 249303246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642303947) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3227559 + ... + 3227757.

It is an arithmetic number, because the mean of its divisors is an integer number (12403200).

Almost surely, 2^642303942 is an apocalyptic number.

642303942 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 642303942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793804800).

642303942 is an abundant number, since it is smaller than the sum of its proper divisors (945305658).

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

642303942 is a wasteful number, since it uses less digits than its factorization.

642303942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 642303942 is about 25343.7160258712. The cubic root of 642303942 is about 862.8067402151.

The spelling of 642303942 in words is "six hundred forty-two million, three hundred three thousand, nine hundred forty-two".