642260824 has 8 divisors (see below), whose sum is σ = 1204239060. Its totient is φ = 321130408.

The previous prime is 642260813. The next prime is 642260849. The reversal of 642260824 is 428062246.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 642260824.

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 as a sum of consecutive naturals, namely, 40141294 + ... + 40141309.

Almost surely, 2^642260824 is an apocalyptic number.

It is an amenable number.

642260824 is a deficient number, since it is larger than the sum of its proper divisors (561978236).

642260824 is a wasteful number, since it uses less digits than its factorization.

642260824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80282609 (or 80282605 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 642260824 is about 25342.8653470755. The cubic root of 642260824 is about 862.7874329832.

The spelling of 642260824 in words is "six hundred forty-two million, two hundred sixty thousand, eight hundred twenty-four".