57447987 has 8 divisors (see below), whose sum is σ = 77458320. Its totient is φ = 37868160.

The previous prime is 57447983. The next prime is 57448003. The reversal of 57447987 is 78974475.

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

It is not a de Polignac number, because 57447987 - 2² = 57447983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57447983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107314 + ... + 107847.

It is an arithmetic number, because the mean of its divisors is an integer number (9682290).

Almost surely, 2^57447987 is an apocalyptic number.

57447987 is a deficient number, since it is larger than the sum of its proper divisors (20010333).

57447987 is a wasteful number, since it uses less digits than its factorization.

57447987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215253.

The product of its digits is 1975680, while the sum is 51.

The square root of 57447987 is about 7579.4450324546. The cubic root of 57447987 is about 385.8557162519.

It can be divided in two parts, 5744 and 7987, that added together give a palindrome (13731).

The spelling of 57447987 in words is "fifty-seven million, four hundred forty-seven thousand, nine hundred eighty-seven".