728478 has 12 divisors (see below), whose sum is σ = 1578408. Its totient is φ = 242820.

The previous prime is 728477. The next prime is 728489. The reversal of 728478 is 874827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20218 + ... + 20253.

It is an arithmetic number, because the mean of its divisors is an integer number (131534).

2⁷²⁸⁴⁷⁸ is an apocalyptic number.

728478 is an abundant number, since it is smaller than the sum of its proper divisors (849930).

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

728478 is a wasteful number, since it uses less digits than its factorization.

728478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40479 (or 40476 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 728478 is about 853.5092266637. The cubic root of 728478 is about 89.9785133892.

The spelling of 728478 in words is "seven hundred twenty-eight thousand, four hundred seventy-eight".