728284615 has 4 divisors (see below), whose sum is σ = 873941544. Its totient is φ = 582627688.

The previous prime is 728284603. The next prime is 728284621. The reversal of 728284615 is 516482827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728284615 - 2²³ = 719896007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72828457 + ... + 72828466.

It is an arithmetic number, because the mean of its divisors is an integer number (218485386).

Almost surely, 2^728284615 is an apocalyptic number.

728284615 is a deficient number, since it is larger than the sum of its proper divisors (145656929).

728284615 is a wasteful number, since it uses less digits than its factorization.

728284615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145656928.

The product of its digits is 215040, while the sum is 43.

The square root of 728284615 is about 26986.7488779215. The cubic root of 728284615 is about 899.7055065285.

The spelling of 728284615 in words is "seven hundred twenty-eight million, two hundred eighty-four thousand, six hundred fifteen".