642434352 has 160 divisors (see below), whose sum is σ = 2051868672. Its totient is φ = 169009152.

The previous prime is 642434347. The next prime is 642434363. The reversal of 642434352 is 253434246.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267268 + ... + 269660.

Almost surely, 2^642434352 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 642434352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025934336).

642434352 is an abundant number, since it is smaller than the sum of its proper divisors (1409434320).

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

642434352 is a wasteful number, since it uses less digits than its factorization.

642434352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2469 counting only the distinct ones).

The product of its digits is 69120, while the sum is 33.

The square root of 642434352 is about 25346.2887224146. The cubic root of 642434352 is about 862.8651295048.

Adding to 642434352 its reverse (253434246), we get a palindrome (895868598).

The spelling of 642434352 in words is "six hundred forty-two million, four hundred thirty-four thousand, three hundred fifty-two".