978002 has 4 divisors (see below), whose sum is σ = 1467006. Its totient is φ = 489000.

The previous prime is 978001. The next prime is 978007. The reversal of 978002 is 200879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200879 = 7 ⋅28697.

It can be written as a sum of positive squares in only one way, i.e., 516961 + 461041 = 719^2 + 679^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (978001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244499 + ... + 244502.

2⁹⁷⁸⁰⁰² is an apocalyptic number.

978002 is a deficient number, since it is larger than the sum of its proper divisors (489004).

978002 is a wasteful number, since it uses less digits than its factorization.

978002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489003.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 978002 is about 988.9398363905. The cubic root of 978002 is about 99.2612898433.

The spelling of 978002 in words is "nine hundred seventy-eight thousand, two".