740720 has 40 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 288512.

The previous prime is 740717. The next prime is 740737. The reversal of 740720 is 27047.

740720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×740720² = 1097332236800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 740692 and 740701.

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, 3662 + ... + 3858.

2⁷⁴⁰⁷²⁰ 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 740720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883872).

740720 is an abundant number, since it is smaller than the sum of its proper divisors (1027024).

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

740720 is a wasteful number, since it uses less digits than its factorization.

740720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 740720 is about 860.6509164580. The cubic root of 740720 is about 90.4797427265.

Adding to 740720 its reverse (27047), we get a palindrome (767767).

The spelling of 740720 in words is "seven hundred forty thousand, seven hundred twenty", and thus it is an iban number.