232638642 has 60 divisors (see below), whose sum is σ = 553861770. Its totient is φ = 72969984.

The previous prime is 232638631. The next prime is 232638691. The reversal of 232638642 is 246836232.

232638642 is a `hidden beast` number, since 2 + 3 + 2 + 6 + 3 + 8 + 642 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 217592001 + 15046641 = 14751^2 + 3879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 232638597 and 232638606.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 44334 + ... + 49302.

Almost surely, 2^232638642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 232638642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276930885).

232638642 is an abundant number, since it is smaller than the sum of its proper divisors (321223128).

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

232638642 is a wasteful number, since it uses less digits than its factorization.

232638642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017 (or 4991 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 232638642 is about 15252.4962547119. The cubic root of 232638642 is about 615.0266734416.

The spelling of 232638642 in words is "two hundred thirty-two million, six hundred thirty-eight thousand, six hundred forty-two".