791281536 has 32 divisors (see below), whose sum is σ = 2101842600. Its totient is φ = 263760384.

The previous prime is 791281499. The next prime is 791281537. The reversal of 791281536 is 635182197.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×791281536² = 1252252938429038592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791281537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029931 + ... + 1030698.

Almost surely, 2^791281536 is an apocalyptic number.

It is an amenable number.

791281536 is an abundant number, since it is smaller than the sum of its proper divisors (1310561064).

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

791281536 is a wasteful number, since it uses less digits than its factorization.

791281536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060646 (or 2060634 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 791281536 is about 28129.7269094458. The cubic root of 791281536 is about 924.9331477373.

The spelling of 791281536 in words is "seven hundred ninety-one million, two hundred eighty-one thousand, five hundred thirty-six".