728674457 has 8 divisors (see below), whose sum is σ = 834367296. Its totient is φ = 623380752.

The previous prime is 728674421. The next prime is 728674469. The reversal of 728674457 is 754476827.

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

It is a cyclic number.

It is not a de Polignac number, because 728674457 - 2¹⁰ = 728673433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728674357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95858 + ... + 103179.

It is an arithmetic number, because the mean of its divisors is an integer number (104295912).

Almost surely, 2^728674457 is an apocalyptic number.

It is an amenable number.

728674457 is a deficient number, since it is larger than the sum of its proper divisors (105692839).

728674457 is a wasteful number, since it uses less digits than its factorization.

728674457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199567.

The product of its digits is 2634240, while the sum is 50.

The square root of 728674457 is about 26993.9707527440. The cubic root of 728674457 is about 899.8660117406.

The spelling of 728674457 in words is "seven hundred twenty-eight million, six hundred seventy-four thousand, four hundred fifty-seven".