978662 has 8 divisors (see below), whose sum is σ = 1479936. Its totient is φ = 485352.

The previous prime is 978647. The next prime is 978683. The reversal of 978662 is 266879.

978662 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978662.

It is an unprimeable number.

978662 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673 + ... + 2180.

It is an arithmetic number, because the mean of its divisors is an integer number (184992).

2⁹⁷⁸⁶⁶² is an apocalyptic number.

978662 is a deficient number, since it is larger than the sum of its proper divisors (501274).

978662 is a wasteful number, since it uses less digits than its factorization.

978662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982.

The product of its digits is 36288, while the sum is 38.

The square root of 978662 is about 989.2734707855. The cubic root of 978662 is about 99.2836134923.

The spelling of 978662 in words is "nine hundred seventy-eight thousand, six hundred sixty-two".