57998987 has 8 divisors (see below), whose sum is σ = 59368512. Its totient is φ = 56635200.

The previous prime is 57998981. The next prime is 57998999. The reversal of 57998987 is 78989975.

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

It is a cyclic number.

It is not a de Polignac number, because 57998987 - 2⁴ = 57998971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57998981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24287 + ... + 26567.

It is an arithmetic number, because the mean of its divisors is an integer number (7421064).

Almost surely, 2^57998987 is an apocalyptic number.

57998987 is a deficient number, since it is larger than the sum of its proper divisors (1369525).

57998987 is a wasteful number, since it uses less digits than its factorization.

57998987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869.

The product of its digits is 11430720, while the sum is 62.

The square root of 57998987 is about 7615.7065988653. The cubic root of 57998987 is about 387.0854104876.

It can be divided in two parts, 57998 and 987, that added together give a palindrome (58985).

The spelling of 57998987 in words is "fifty-seven million, nine hundred ninety-eight thousand, nine hundred eighty-seven".