642346012 has 24 divisors (see below), whose sum is σ = 1401482880. Its totient is φ = 250264560.

The previous prime is 642345989. The next prime is 642346021. The reversal of 642346012 is 210643246.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042462 + ... + 1043077.

It is an arithmetic number, because the mean of its divisors is an integer number (58395120).

Almost surely, 2^642346012 is an apocalyptic number.

It is an amenable number.

642346012 is an abundant number, since it is smaller than the sum of its proper divisors (759136868).

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

642346012 is a wasteful number, since it uses less digits than its factorization.

642346012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085561 (or 2085559 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 642346012 is about 25344.5460010630. The cubic root of 642346012 is about 862.8255773443.

Adding to 642346012 its reverse (210643246), we get a palindrome (852989258).

The spelling of 642346012 in words is "six hundred forty-two million, three hundred forty-six thousand, twelve".