728503840 has 48 divisors (see below), whose sum is σ = 1795929408. Its totient is φ = 278730496.

The previous prime is 728503837. The next prime is 728503843. The reversal of 728503840 is 48305827.

It is an interprime number because it is at equal distance from previous prime (728503837) and next prime (728503843).

It is a self number, because there is not a number n which added to its sum of digits gives 728503840.

It is not an unprimeable number, because it can be changed into a prime (728503843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95302 + ... + 102661.

It is an arithmetic number, because the mean of its divisors is an integer number (37415196).

Almost surely, 2^728503840 is an apocalyptic number.

It is an amenable number.

728503840 is an abundant number, since it is smaller than the sum of its proper divisors (1067425568).

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

728503840 is a wasteful number, since it uses less digits than its factorization.

728503840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198001 (or 197993 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 728503840 is about 26990.8102879480. The cubic root of 728503840 is about 899.7957725904.

The spelling of 728503840 in words is "seven hundred twenty-eight million, five hundred three thousand, eight hundred forty".