9978862 has 4 divisors (see below), whose sum is σ = 14968296. Its totient is φ = 4989430.

The previous prime is 9978833. The next prime is 9978877. The reversal of 9978862 is 2688799.

It is a happy number.

9978862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494714 + ... + 2494717.

It is an arithmetic number, because the mean of its divisors is an integer number (3742074).

Almost surely, 2^9978862 is an apocalyptic number.

9978862 is a deficient number, since it is larger than the sum of its proper divisors (4989434).

9978862 is a wasteful number, since it uses less digits than its factorization.

9978862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989433.

The product of its digits is 435456, while the sum is 49.

The square root of 9978862 is about 3158.9336808486. The cubic root of 9978862 is about 215.2915604498.

It can be divided in two parts, 99 and 78862, that added together give a square (78961 = 281²).

The spelling of 9978862 in words is "nine million, nine hundred seventy-eight thousand, eight hundred sixty-two".