747478 has 8 divisors (see below), whose sum is σ = 1126440. Its totient is φ = 372000.

The previous prime is 747463. The next prime is 747493. The reversal of 747478 is 874747.

It is an interprime number because it is at equal distance from previous prime (747463) and next prime (747493).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

747478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (140805).

2⁷⁴⁷⁴⁷⁸ is an apocalyptic number.

747478 is a deficient number, since it is larger than the sum of its proper divisors (378962).

747478 is a wasteful number, since it uses less digits than its factorization.

747478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742.

The product of its digits is 43904, while the sum is 37.

The square root of 747478 is about 864.5681002674. The cubic root of 747478 is about 90.7540757630.

It can be divided in two parts, 747 and 478, that added together give a triangular number (1225 = T₄₉).

The spelling of 747478 in words is "seven hundred forty-seven thousand, four hundred seventy-eight".