7213870 has 8 divisors (see below), whose sum is σ = 12984984. Its totient is φ = 2885544.

The previous prime is 7213861. The next prime is 7213897. The reversal of 7213870 is 783127.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360684 + ... + 360703.

It is an arithmetic number, because the mean of its divisors is an integer number (1623123).

Almost surely, 2^7213870 is an apocalyptic number.

7213870 is a deficient number, since it is larger than the sum of its proper divisors (5771114).

7213870 is a wasteful number, since it uses less digits than its factorization.

7213870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721394.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 7213870 is about 2685.8648514026. The cubic root of 7213870 is about 193.2217912543.

Adding to 7213870 its reverse (783127), we get a palindrome (7996997).

The spelling of 7213870 in words is "seven million, two hundred thirteen thousand, eight hundred seventy".