7213340 has 24 divisors (see below), whose sum is σ = 15407280. Its totient is φ = 2835968.

The previous prime is 7213337. The next prime is 7213343. The reversal of 7213340 is 433127.

7213340 = 405² + 406² + ... + 444².

It is an interprime number because it is at equal distance from previous prime (7213337) and next prime (7213343).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (641970).

Almost surely, 2^7213340 is an apocalyptic number.

It is an amenable number.

7213340 is an abundant number, since it is smaller than the sum of its proper divisors (8193940).

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

7213340 is a wasteful number, since it uses less digits than its factorization.

7213340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181 (or 6179 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 7213340 is about 2685.7661849089. The cubic root of 7213340 is about 193.2170591638.

Adding to 7213340 its reverse (433127), we get a palindrome (7646467).

The spelling of 7213340 in words is "seven million, two hundred thirteen thousand, three hundred forty".