487978 has 4 divisors (see below), whose sum is σ = 731970. Its totient is φ = 243988.

The previous prime is 487973. The next prime is 487979. The reversal of 487978 is 879784.

487978 is digitally balanced in base 3, 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 can be written as a sum of positive squares in only one way, i.e., 413449 + 74529 = 643^2 + 273^2 .

It is not an unprimeable number, because it can be changed into a prime (487973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121993 + ... + 121996.

2⁴⁸⁷⁹⁷⁸ is an apocalyptic number.

487978 is a deficient number, since it is larger than the sum of its proper divisors (243992).

487978 is a wasteful number, since it uses less digits than its factorization.

487978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243991.

The product of its digits is 112896, while the sum is 43.

The square root of 487978 is about 698.5542212313. The cubic root of 487978 is about 78.7287605440.

The spelling of 487978 in words is "four hundred eighty-seven thousand, nine hundred seventy-eight".