9978834 has 16 divisors (see below), whose sum is σ = 19988640. Its totient is φ = 3321120.

The previous prime is 9978833. The next prime is 9978877. The reversal of 9978834 is 4388799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6894 + ... + 8214.

It is an arithmetic number, because the mean of its divisors is an integer number (1249290).

Almost surely, 2^9978834 is an apocalyptic number.

9978834 is an abundant number, since it is smaller than the sum of its proper divisors (10009806).

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

9978834 is a wasteful number, since it uses less digits than its factorization.

9978834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585.

The product of its digits is 435456, while the sum is 48.

The square root of 9978834 is about 3158.9292489703. The cubic root of 9978834 is about 215.2913590852.

The spelling of 9978834 in words is "nine million, nine hundred seventy-eight thousand, eight hundred thirty-four".