642288696 has 64 divisors (see below), whose sum is σ = 1943066880. Its totient is φ = 172715520.

The previous prime is 642288683. The next prime is 642288697. The reversal of 642288696 is 696882246.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642288697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109590 + ... + 115301.

It is an arithmetic number, because the mean of its divisors is an integer number (30360420).

Almost surely, 2^642288696 is an apocalyptic number.

It is an amenable number.

642288696 is an abundant number, since it is smaller than the sum of its proper divisors (1300778184).

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

642288696 is a wasteful number, since it uses less digits than its factorization.

642288696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224924 (or 224920 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 642288696 is about 25343.4152394660. The cubic root of 642288696 is about 862.7999135116.

The spelling of 642288696 in words is "six hundred forty-two million, two hundred eighty-eight thousand, six hundred ninety-six".