728604499840 has 64 divisors (see below), whose sum is σ = 1990651592160. Its totient is φ = 249807255552.

The previous prime is 728604499837. The next prime is 728604499867. The reversal of 728604499840 is 48994406827.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81312987 + ... + 81321946.

Almost surely, 2^728604499840 is an apocalyptic number.

728604499840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

728604499840 is an abundant number, since it is smaller than the sum of its proper divisors (1262047092320).

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

728604499840 is a wasteful number, since it uses less digits than its factorization.

728604499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162634959 (or 162634947 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 728604499840 in words is "seven hundred twenty-eight billion, six hundred four million, four hundred ninety-nine thousand, eight hundred forty".