978830 has 8 divisors (see below), whose sum is σ = 1761912. Its totient is φ = 391528.

The previous prime is 978821. The next prime is 978839. The reversal of 978830 is 38879.

It is an interprime number because it is at equal distance from previous prime (978821) and next prime (978839).

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978839) by changing a digit.

978830 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, 48932 + ... + 48951.

It is an arithmetic number, because the mean of its divisors is an integer number (220239).

2⁹⁷⁸⁸³⁰ is an apocalyptic number.

978830 is a deficient number, since it is larger than the sum of its proper divisors (783082).

978830 is a wasteful number, since it uses less digits than its factorization.

978830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97890.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 978830 is about 989.3583779400. The cubic root of 978830 is about 99.2892942730.

The spelling of 978830 in words is "nine hundred seventy-eight thousand, eight hundred thirty".