57248789 has 4 divisors (see below), whose sum is σ = 61652556. Its totient is φ = 52845024.

The previous prime is 57248761. The next prime is 57248801. The reversal of 57248789 is 98784275.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35700625 + 21548164 = 5975^2 + 4642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57248789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57248749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2201864 + ... + 2201889.

It is an arithmetic number, because the mean of its divisors is an integer number (15413139).

Almost surely, 2^57248789 is an apocalyptic number.

It is an amenable number.

57248789 is a deficient number, since it is larger than the sum of its proper divisors (4403767).

57248789 is a wasteful number, since it uses less digits than its factorization.

57248789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403766.

The product of its digits is 1128960, while the sum is 50.

The square root of 57248789 is about 7566.2929496551. The cubic root of 57248789 is about 385.4092213700.

The spelling of 57248789 in words is "fifty-seven million, two hundred forty-eight thousand, seven hundred eighty-nine".