7213940 has 24 divisors (see below), whose sum is σ = 15295392. Its totient is φ = 2857760.

The previous prime is 7213937. The next prime is 7214023. The reversal of 7213940 is 493127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 3825.

It is an arithmetic number, because the mean of its divisors is an integer number (637308).

Almost surely, 2^7213940 is an apocalyptic number.

It is an amenable number.

7213940 is an abundant number, since it is smaller than the sum of its proper divisors (8081452).

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

7213940 is a wasteful number, since it uses less digits than its factorization.

7213940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487 (or 3485 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 7213940 is about 2685.8778825553. The cubic root of 7213940 is about 193.2224162300. Note that the first 3 decimals are identical.

The spelling of 7213940 in words is "seven million, two hundred thirteen thousand, nine hundred forty".