7481998 has 8 divisors (see below), whose sum is σ = 11338992. Its totient is φ = 3702336.

The previous prime is 7481993. The next prime is 7482001. The reversal of 7481998 is 8991847.

It is a happy number.

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

It is a super-3 number, since 3×7481998³ (a number of 22 digits) contains 333 as substring.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7481993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19090 + ... + 19477.

It is an arithmetic number, because the mean of its divisors is an integer number (1417374).

Almost surely, 2^7481998 is an apocalyptic number.

7481998 is a deficient number, since it is larger than the sum of its proper divisors (3856994).

7481998 is a wasteful number, since it uses less digits than its factorization.

7481998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38666.

The product of its digits is 145152, while the sum is 46.

The square root of 7481998 is about 2735.3241124225. The cubic root of 7481998 is about 195.5866444824.

The spelling of 7481998 in words is "seven million, four hundred eighty-one thousand, nine hundred ninety-eight".