728773355 has 4 divisors (see below), whose sum is σ = 874528032. Its totient is φ = 583018680.

The previous prime is 728773351. The next prime is 728773361. The reversal of 728773355 is 553377827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553377827 = 11171 ⋅49537.

It is not a de Polignac number, because 728773355 - 2² = 728773351 is a prime.

It is a super-2 number, since 2×728773355² = 1062221205915912050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728773351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72877331 + ... + 72877340.

It is an arithmetic number, because the mean of its divisors is an integer number (218632008).

Almost surely, 2^728773355 is an apocalyptic number.

728773355 is a deficient number, since it is larger than the sum of its proper divisors (145754677).

728773355 is a wasteful number, since it uses less digits than its factorization.

728773355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145754676.

The product of its digits is 1234800, while the sum is 47.

The square root of 728773355 is about 26995.8025440993. The cubic root of 728773355 is about 899.9067207852.

The spelling of 728773355 in words is "seven hundred twenty-eight million, seven hundred seventy-three thousand, three hundred fifty-five".