7213998 has 16 divisors (see below), whose sum is σ = 15739776. Its totient is φ = 2186040.

The previous prime is 7213937. The next prime is 7214023. The reversal of 7213998 is 8993127.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54586 + ... + 54717.

It is an arithmetic number, because the mean of its divisors is an integer number (983736).

Almost surely, 2^7213998 is an apocalyptic number.

7213998 is an abundant number, since it is smaller than the sum of its proper divisors (8525778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7213998 is a wasteful number, since it uses less digits than its factorization.

7213998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109319.

The product of its digits is 27216, while the sum is 39.

The square root of 7213998 is about 2685.8886797483. Note that the first 3 decimals coincide. The cubic root of 7213998 is about 193.2229340640. Note that the first 3 decimals are identical.

The spelling of 7213998 in words is "seven million, two hundred thirteen thousand, nine hundred ninety-eight".