7243400 has 24 divisors (see below), whose sum is σ = 16841370. Its totient is φ = 2897280.

The previous prime is 7243399. The next prime is 7243403. The reversal of 7243400 is 43427.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3865156 + 3378244 = 1966^2 + 1838^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7243403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17909 + ... + 18308.

Almost surely, 2^7243400 is an apocalyptic number.

It is an amenable number.

7243400 is an abundant number, since it is smaller than the sum of its proper divisors (9597970).

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

7243400 is a wasteful number, since it uses less digits than its factorization.

7243400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36233 (or 36224 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 7243400 is about 2691.3565352810. The cubic root of 7243400 is about 193.4850836586.

Adding to 7243400 its reverse (43427), we get a palindrome (7286827).

The spelling of 7243400 in words is "seven million, two hundred forty-three thousand, four hundred".