9870642 has 24 divisors (see below), whose sum is σ = 22645116. Its totient is φ = 3096576.

The previous prime is 9870589. The next prime is 9870647. The reversal of 9870642 is 2460789.

9870642 is a `hidden beast` number, since 9 + 8 + 7 + 0 + 642 = 666.

9870642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9865881 + 4761 = 3141^2 + 69^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9870597 and 9870606.

It is not an unprimeable number, because it can be changed into a prime (9870647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15823 + ... + 16434.

Almost surely, 2^9870642 is an apocalyptic number.

9870642 is an abundant number, since it is smaller than the sum of its proper divisors (12774474).

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

9870642 is a wasteful number, since it uses less digits than its factorization.

9870642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32282 (or 32279 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 9870642 is about 3141.7577882453. The cubic root of 9870642 is about 214.5104563993.

The spelling of 9870642 in words is "nine million, eight hundred seventy thousand, six hundred forty-two".