747428 has 12 divisors (see below), whose sum is σ = 1426992. Its totient is φ = 339720.

The previous prime is 747427. The next prime is 747449. The reversal of 747428 is 824747.

It is a junction number, because it is equal to n+sod(n) for n = 747394 and 747403.

It is not an unprimeable number, because it can be changed into a prime (747421) 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, 8450 + ... + 8537.

It is an arithmetic number, because the mean of its divisors is an integer number (118916).

2⁷⁴⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

747428 is a deficient number, since it is larger than the sum of its proper divisors (679564).

747428 is a wasteful number, since it uses less digits than its factorization.

747428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17002 (or 17000 counting only the distinct ones).

The product of its digits is 12544, while the sum is 32.

The square root of 747428 is about 864.5391836117. The cubic root of 747428 is about 90.7520521561.

The spelling of 747428 in words is "seven hundred forty-seven thousand, four hundred twenty-eight".