728041820 has 48 divisors (see below), whose sum is σ = 1721696256. Its totient is φ = 256200000.

The previous prime is 728041817. The next prime is 728041823. The reversal of 728041820 is 28140827.

It is an interprime number because it is at equal distance from previous prime (728041817) and next prime (728041823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728041823) 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, 46556 + ... + 60195.

It is an arithmetic number, because the mean of its divisors is an integer number (35868672).

Almost surely, 2^728041820 is an apocalyptic number.

It is an amenable number.

728041820 is an abundant number, since it is smaller than the sum of its proper divisors (993654436).

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

728041820 is a wasteful number, since it uses less digits than its factorization.

728041820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106802 (or 106800 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 728041820 is about 26982.2500914953. The cubic root of 728041820 is about 899.6055143581.

The spelling of 728041820 in words is "seven hundred twenty-eight million, forty-one thousand, eight hundred twenty".