642596436 has 48 divisors (see below), whose sum is σ = 1671503680. Its totient is φ = 213490080.

The previous prime is 642596431. The next prime is 642596483. The reversal of 642596436 is 634695246.

642596436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 642596391 and 642596400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642596431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23466 + ... + 42846.

Almost surely, 2^642596436 is an apocalyptic number.

It is an amenable number.

642596436 is an abundant number, since it is smaller than the sum of its proper divisors (1028907244).

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

642596436 is a wasteful number, since it uses less digits than its factorization.

642596436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19701 (or 19693 counting only the distinct ones).

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

The square root of 642596436 is about 25349.4859119470. The cubic root of 642596436 is about 862.9376893812.

The spelling of 642596436 in words is "six hundred forty-two million, five hundred ninety-six thousand, four hundred thirty-six".