728611286590 has 128 divisors (see below), whose sum is σ = 1514341785600. Its totient is φ = 249911040000.

The previous prime is 728611286479. The next prime is 728611286629. The reversal of 728611286590 is 95682116827.

It is a happy number.

It is a super-2 number, since 2×728611286590² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 211251186 + ... + 211254634.

It is an arithmetic number, because the mean of its divisors is an integer number (11830795200).

Almost surely, 2^728611286590 is an apocalyptic number.

728611286590 is an abundant number, since it is smaller than the sum of its proper divisors (785730499010).

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

728611286590 is a wasteful number, since it uses less digits than its factorization.

728611286590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 728611286590 in words is "seven hundred twenty-eight billion, six hundred eleven million, two hundred eighty-six thousand, five hundred ninety".