742440 has 64 divisors (see below), whose sum is σ = 2332800. Its totient is φ = 188672.

The previous prime is 742439. The next prime is 742457. The reversal of 742440 is 44247.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2626 + ... + 2894.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2⁷⁴²⁴⁴⁰ 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 742440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166400).

742440 is an abundant number, since it is smaller than the sum of its proper divisors (1590360).

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

742440 is a wasteful number, since it uses less digits than its factorization.

742440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 742440 is about 861.6495807461. The cubic root of 742440 is about 90.5497218708.

Adding to 742440 its reverse (44247), we get a palindrome (786687).

The spelling of 742440 in words is "seven hundred forty-two thousand, four hundred forty", and thus it is an iban number.