728209284 has 48 divisors (see below), whose sum is σ = 1903734336. Its totient is φ = 214704000.

The previous prime is 728209283. The next prime is 728209291. The reversal of 728209284 is 482902827.

It is a super-2 number, since 2×728209284² = 1060577522607585312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728209283) 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, 69667 + ... + 79434.

It is an arithmetic number, because the mean of its divisors is an integer number (39661132).

Almost surely, 2^728209284 is an apocalyptic number.

728209284 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

728209284 is an abundant number, since it is smaller than the sum of its proper divisors (1175525052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728209284 is a wasteful number, since it uses less digits than its factorization.

728209284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149156 (or 149154 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 728209284 is about 26985.3531383230. The cubic root of 728209284 is about 899.6744847498.

It can be divided in two parts, 728 and 209284, that added together give a palindrome (210012).

The spelling of 728209284 in words is "seven hundred twenty-eight million, two hundred nine thousand, two hundred eighty-four".