9887742 has 12 divisors (see below), whose sum is σ = 21423480. Its totient is φ = 3295908.

The previous prime is 9887741. The next prime is 9887747. The reversal of 9887742 is 2477889.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9887741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274642 + ... + 274677.

It is an arithmetic number, because the mean of its divisors is an integer number (1785290).

Almost surely, 2^9887742 is an apocalyptic number.

9887742 is an abundant number, since it is smaller than the sum of its proper divisors (11535738).

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

9887742 is a wasteful number, since it uses less digits than its factorization.

9887742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549327 (or 549324 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 9887742 is about 3144.4780170960. The cubic root of 9887742 is about 214.6342582961.

The spelling of 9887742 in words is "nine million, eight hundred eighty-seven thousand, seven hundred forty-two".