5657998 has 4 divisors (see below), whose sum is σ = 8487000. Its totient is φ = 2828998.

The previous prime is 5657989. The next prime is 5657999. The reversal of 5657998 is 8997565.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5657999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1414498 + ... + 1414501.

It is an arithmetic number, because the mean of its divisors is an integer number (2121750).

Almost surely, 2^5657998 is an apocalyptic number.

5657998 is a deficient number, since it is larger than the sum of its proper divisors (2829002).

5657998 is a wasteful number, since it uses less digits than its factorization.

5657998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829001.

The product of its digits is 680400, while the sum is 49.

The square root of 5657998 is about 2378.6546617784. The cubic root of 5657998 is about 178.1917514467.

The spelling of 5657998 in words is "five million, six hundred fifty-seven thousand, nine hundred ninety-eight".