747440 has 20 divisors (see below), whose sum is σ = 1737984. Its totient is φ = 298944.

The previous prime is 747427. The next prime is 747449. The reversal of 747440 is 44747.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (747449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4592 + ... + 4751.

2⁷⁴⁷⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

747440 is an abundant number, since it is smaller than the sum of its proper divisors (990544).

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

747440 is a wasteful number, since it uses less digits than its factorization.

747440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9356 (or 9350 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 747440 is about 864.5461236973. The cubic root of 747440 is about 90.7525378300.

The spelling of 747440 in words is "seven hundred forty-seven thousand, four hundred forty", and thus it is an iban number.