978854 has 4 divisors (see below), whose sum is σ = 1468284. Its totient is φ = 489426.

The previous prime is 978853. The next prime is 978863. The reversal of 978854 is 458879.

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

It is a super-3 number, since 3×978854³ = 2813682013331939592, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244712 + ... + 244715.

It is an arithmetic number, because the mean of its divisors is an integer number (367071).

2⁹⁷⁸⁸⁵⁴ is an apocalyptic number.

978854 is a deficient number, since it is larger than the sum of its proper divisors (489430).

978854 is a wasteful number, since it uses less digits than its factorization.

978854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489429.

The product of its digits is 80640, while the sum is 41.

The square root of 978854 is about 989.3705069386. The cubic root of 978854 is about 99.2901057601.

The spelling of 978854 in words is "nine hundred seventy-eight thousand, eight hundred fifty-four".