642436596 has 108 divisors (see below), whose sum is σ = 1789755968. Its totient is φ = 201460608.

The previous prime is 642436589. The next prime is 642436601. The reversal of 642436596 is 695634246.

642436596 is a `hidden beast` number, since 6 + 4 + 24 + 36 + 596 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 279765 + ... + 282051.

Almost surely, 2^642436596 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 642436596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894877984).

642436596 is an abundant number, since it is smaller than the sum of its proper divisors (1147319372).

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

642436596 is a wasteful number, since it uses less digits than its factorization.

642436596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340 (or 2309 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 642436596 is about 25346.3329892117. The cubic root of 642436596 is about 862.8661341558.

The spelling of 642436596 in words is "six hundred forty-two million, four hundred thirty-six thousand, five hundred ninety-six".