7213908 has 48 divisors (see below), whose sum is σ = 18317376. Its totient is φ = 2196480.

The previous prime is 7213903. The next prime is 7213919. The reversal of 7213908 is 8093127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213903) 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 15 ways as a sum of consecutive naturals, for example, 20260 + ... + 20612.

It is an arithmetic number, because the mean of its divisors is an integer number (381612).

Almost surely, 2^7213908 is an apocalyptic number.

7213908 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7213908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9158688).

7213908 is an abundant number, since it is smaller than the sum of its proper divisors (11103468).

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

7213908 is a wasteful number, since it uses less digits than its factorization.

7213908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 7213908 is about 2685.8719254648. The cubic root of 7213908 is about 193.2221305273. Note that the first 3 decimals are identical.

The spelling of 7213908 in words is "seven million, two hundred thirteen thousand, nine hundred eight".