1364725728 has 72 divisors (see below), whose sum is σ = 4109244048. Its totient is φ = 428147712.

The previous prime is 1364725709. The next prime is 1364725763. The reversal of 1364725728 is 8275274631.

1364725728 is a `hidden beast` number, since 1 + 3 + 6 + 4 + 72 + 572 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134476 + ... + 144267.

It is an arithmetic number, because the mean of its divisors is an integer number (57072834).

Almost surely, 2^1364725728 is an apocalyptic number.

1364725728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1364725728 is an abundant number, since it is smaller than the sum of its proper divisors (2744518320).

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

1364725728 is a wasteful number, since it uses less digits than its factorization.

1364725728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278776 (or 278765 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 1364725728 is about 36942.1944123518. The cubic root of 1364725728 is about 1109.2134481335.

The spelling of 1364725728 in words is "one billion, three hundred sixty-four million, seven hundred twenty-five thousand, seven hundred twenty-eight".