487891078 has 4 divisors (see below), whose sum is σ = 731836620. Its totient is φ = 243945538.

The previous prime is 487891057. The next prime is 487891081. The reversal of 487891078 is 870198784.

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

It is a congruent number.

It is an unprimeable number.

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, 121972768 + ... + 121972771.

It is an arithmetic number, because the mean of its divisors is an integer number (182959155).

Almost surely, 2^487891078 is an apocalyptic number.

487891078 is a deficient number, since it is larger than the sum of its proper divisors (243945542).

487891078 is a wasteful number, since it uses less digits than its factorization.

487891078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243945541.

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 487891078 is about 22088.2565631604. The cubic root of 487891078 is about 787.2408569687.

The spelling of 487891078 in words is "four hundred eighty-seven million, eight hundred ninety-one thousand, seventy-eight".