4451998 has 4 divisors (see below), whose sum is σ = 6678000. Its totient is φ = 2225998.

The previous prime is 4451983. The next prime is 4451999. The reversal of 4451998 is 8991544.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 4451998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112998 + ... + 1113001.

It is an arithmetic number, because the mean of its divisors is an integer number (1669500).

Almost surely, 2^4451998 is an apocalyptic number.

4451998 is a deficient number, since it is larger than the sum of its proper divisors (2226002).

4451998 is a wasteful number, since it uses less digits than its factorization.

4451998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226001.

The product of its digits is 51840, while the sum is 40.

The square root of 4451998 is about 2109.9758292454. The cubic root of 4451998 is about 164.5072289208.

The spelling of 4451998 in words is "four million, four hundred fifty-one thousand, nine hundred ninety-eight".