642453024 has 96 divisors (see below), whose sum is σ = 1743565824. Its totient is φ = 207002880.

The previous prime is 642453013. The next prime is 642453029. The reversal of 642453024 is 420354246.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 642452982 and 642453000.

It is not an unprimeable number, because it can be changed into a prime (642453029) 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, 424429 + ... + 425939.

It is an arithmetic number, because the mean of its divisors is an integer number (18162144).

Almost surely, 2^642453024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642453024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871782912).

642453024 is an abundant number, since it is smaller than the sum of its proper divisors (1101112800).

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

642453024 is a wasteful number, since it uses less digits than its factorization.

642453024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 642453024 is about 25346.6570576871. The cubic root of 642453024 is about 862.8734889901.

The spelling of 642453024 in words is "six hundred forty-two million, four hundred fifty-three thousand, twenty-four".