734240 has 48 divisors (see below), whose sum is σ = 1873368. Its totient is φ = 270336.

The previous prime is 734233. The next prime is 734263. The reversal of 734240 is 42437.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 425104 + 309136 = 652^2 + 556^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1904 + ... + 2256.

2⁷³⁴²⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 734240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936684).

734240 is an abundant number, since it is smaller than the sum of its proper divisors (1139128).

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

734240 is a wasteful number, since it uses less digits than its factorization.

734240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 373 counting only the distinct ones).

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

The square root of 734240 is about 856.8780543345. The cubic root of 734240 is about 90.2151232502.

Adding to 734240 its reverse (42437), we get a palindrome (776677).

The spelling of 734240 in words is "seven hundred thirty-four thousand, two hundred forty".