728388855 has 48 divisors (see below), whose sum is σ = 1313055744. Its totient is φ = 387361440.

The previous prime is 728388833. The next prime is 728388877. The reversal of 728388855 is 558883827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (728388833) and next prime (728388877).

It is not a de Polignac number, because 728388855 - 2⁸ = 728388599 is a prime.

It is a super-2 number, since 2×728388855² = 1061100648176422050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 591090 + ... + 592320.

It is an arithmetic number, because the mean of its divisors is an integer number (27355328).

Almost surely, 2^728388855 is an apocalyptic number.

728388855 is a deficient number, since it is larger than the sum of its proper divisors (584666889).

728388855 is a wasteful number, since it uses less digits than its factorization.

728388855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1726 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 54.

The square root of 728388855 is about 26988.6801270459. The cubic root of 728388855 is about 899.7484296870.

The spelling of 728388855 in words is "seven hundred twenty-eight million, three hundred eighty-eight thousand, eight hundred fifty-five".