728898777 has 16 divisors (see below), whose sum is σ = 1082361280. Its totient is φ = 484802496.

The previous prime is 728898763. The next prime is 728898787. The reversal of 728898777 is 777898827.

It is not a de Polignac number, because 728898777 - 2⁶ = 728898713 is a prime.

It is a super-2 number, since 2×728898777² = 1062586854224191458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728898787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19483 + ... + 42864.

It is an arithmetic number, because the mean of its divisors is an integer number (67647580).

Almost surely, 2^728898777 is an apocalyptic number.

It is an amenable number.

728898777 is a deficient number, since it is larger than the sum of its proper divisors (353462503).

728898777 is a wasteful number, since it uses less digits than its factorization.

728898777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62789 (or 62783 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 63.

The square root of 728898777 is about 26998.1254349260. The cubic root of 728898777 is about 899.9583425163.

Subtracting 728898777 from its reverse (777898827), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 728898777 in words is "seven hundred twenty-eight million, eight hundred ninety-eight thousand, seven hundred seventy-seven".