642412232 has 96 divisors (see below), whose sum is σ = 1528329600. Its totient is φ = 247779840.

The previous prime is 642412219. The next prime is 642412247. The reversal of 642412232 is 232214246.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 765269 + ... + 766107.

It is an arithmetic number, because the mean of its divisors is an integer number (15920100).

Almost surely, 2^642412232 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 642412232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764164800).

642412232 is an abundant number, since it is smaller than the sum of its proper divisors (885917368).

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

642412232 is a wasteful number, since it uses less digits than its factorization.

642412232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 972 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 642412232 is about 25345.8523628621. The cubic root of 642412232 is about 862.8552261345.

Adding to 642412232 its reverse (232214246), we get a palindrome (874626478).

The spelling of 642412232 in words is "six hundred forty-two million, four hundred twelve thousand, two hundred thirty-two".