1294590728 has 12 divisors (see below), whose sum is σ = 2427548445. Its totient is φ = 647244480.

The previous prime is 1294590697. The next prime is 1294590763. The reversal of 1294590728 is 8270954921.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1070729284 + 223861444 = 32722^2 + 14962^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25442.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 95408 + ... + 108128.

Almost surely, 2^1294590728 is an apocalyptic number.

It is an amenable number.

1294590728 is a deficient number, since it is larger than the sum of its proper divisors (1132957717).

1294590728 is an frugal number, since it uses more digits than its factorization.

1294590728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25448 (or 12723 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1294590728 is about 35980.4214538963. The cubic root of 1294590728 is about 1089.8770245349.

The spelling of 1294590728 in words is "one billion, two hundred ninety-four million, five hundred ninety thousand, seven hundred twenty-eight".