728920520412 has 72 divisors (see below), whose sum is σ = 1988441078400. Its totient is φ = 207216424800.

The previous prime is 728920520399. The next prime is 728920520417. The reversal of 728920520412 is 214025029827.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728920520417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2997714 + ... + 3231737.

It is an arithmetic number, because the mean of its divisors is an integer number (27617237200).

Almost surely, 2^728920520412 is an apocalyptic number.

It is an amenable number.

728920520412 is an abundant number, since it is smaller than the sum of its proper divisors (1259520557988).

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

728920520412 is a wasteful number, since it uses less digits than its factorization.

728920520412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6229671 (or 6229662 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 728920520412 in words is "seven hundred twenty-eight billion, nine hundred twenty million, five hundred twenty thousand, four hundred twelve".